Great information that helped me rebuild my valve body after accidentally separating and losing the balls and not knowing where they went inside. Thanks for sharing your knowledge for DIY garage mechanics like myself.
All you guys making vids for these CVTs and sharing the common problems are serious mechanical-saints! Man, I just want to slap you back so hard and give ya a shaking side hug! You’re awesome! Saved me from a raging fit. You give me hope like saving my religion! Fist bump the air as I declare, true heroes!
2 questions for you. 1. What do you think about adding coolers for CTV transmissions? 2. Nissan CVT fluid. Nissan brand fluid is very expensive, I have a nissan second hand and it is way past warranty. I am getting ready to replace the valve body. Are there quality Non Nissan brand CVT fluids I can use, Any recommendations on which are good or what to stay away from? Thanks for the video by the way, you answered something I was confused on, why some of the replacement valve bodies come with wiring for only one of the sensors, You mentioned prior to 2010. I was going to pull mine out before ordering a new one to see if it had one or 2 sensors hooked up, I am assuming now it is going to be 2.
I have a 2011 AWD Tuned Juke and I am starting to get nervous.. I feel the slack in the belt now. If I throw her in sport mode it titans back up but it's getting there.. I found a Brand New CVT fresh in the Box for my Make and Model yesterday for $5500 uninstalled.. Sounds about right..
Not a transmission guy here so from what I understand I can just swap the small black computer off the valve body out of my wife's jeep and Install it in a new valve body and put it back in the Jeep and shouldn't have to program anything?
My 07 patriot in limp life P0700 transmission Control System mil and incorrect gear ratio would that be from a bad valve body it won’t shift pass second it will tack out the rpm
I bought a refurbished valve body for my 2011 Mitsubishi Outlander Sport and it comes with the computer. Do I need to replace the computer with the one from my old valve body?
When putting the "entire" valvebody back in can you still use the drill bit to line up the ratio control arm? I didnt see any other video going further into detail on that or any video on UA-cam and I'm kinda stuck at this part
@@project4funner you pull the arm all the way back and you will notice a small hole that goes straight through the valve body. Place a hair pin or something small in there to keep the arm from moving back. Install the valve body and remove the pin.
@@dwaynedumas5278 thanks for the explanation. I had been having a real hard time trying to get it in place with flat shim stock from above while installing. Should have known there was a better way
@@dwaynedumas5278 i have seen another video, who placed a pin wire but after completing from assembling, he havnt removed the pin, i dont know he forgot or it must not be removed
On minutes 4:03 you put a spring that came out of the valve body and I couldn’t figure out where is it goes abd the stupid mechanic put it on a different place of the valve body ow I need to replace it , where can I buy it. Thank you
I have a 2012 altima 2.5L , does anyone know the part number for the whole valve body? Mine is reading "p1178, transmission reverse i/p circuit malfunction ". Please help
So if you are thrown a P1778 stepper motor code, and replacing the stepper motor will not fix the issue, what exactly is the issue and what needs to be replaced?
Hi i have a 2016 altima sr with 46k after towing it with all the 4 tires on the ground with shipping mode engaged. It will not move fwd or back i have p0746-00 p0848-00 p0965-00 p2765-00 any help would be appreciated
josh bishop - LOL! The similarity of his voice had me wondering if this was AVE's real channel and his whole hilarious canadian mech-tech-nerd goofball persona was just an act for youtube glory!
And to Mr. Kennedy, if you don't know who AVE is, just search his channel on youtube... He sounds JUST like you in tonality and similar in speaking tempo, but with a Canadian flair. :-)
This a great video Kennedy, thank you for posting. I have issues with my valve body after changing the stepper motor on a 2008 Nissan Sentra doesn’t want to back up, I notice that small round black plastic cylinder came out of the valve body, it looks like strainer or filter, and the mechanic not just put it in the wrong place but also broke it, now I am wondering where can I buy it that small cylinder and where exactly goes. In minute 3:32 you removed some of those cylinder but I couldn’t quite see the shape of them, there is anyway you can help me to figure out where that cylinder goes, also another metal cylinder that goes with spring on it came out and no idea where is it goes. Thank you
2012 suziki sx4 wont go pass 20mph. Gives p0777 code. I changed the 1st 4 solenoids you showed on the video with no luck. What could cause this? Also chaed the transmission fluid.
Thank you very much. I did not realize I took apart too many bolts and it came apart in sections so trying to figure out what those balls went was a big help I've learned my lesson. Lol thank you big time. What causes that plunger where that stepper motor attaches to to get jammed up because on my I literally had to use a hammer to get that plunger to come out and it's very stuck
hai, mine is 2013 Nissan altima. especially in winter, for the firs 4 to 5 km of each drive. car runs very slow, 30km speed at 2000 RPM.(I can feel the lack of power). once the engine is hot, after 5km. immediately the transmission will properly engaged to engine and run normal. In 2018, I changed transmission, but the same problem is still exist. could you please explain me what is the real issue. Nissan dont want to help me more. would you please advise me. thanks.
Hay jeff i have a 2010 Mitsubishi lancer gts with a cvt jatco. When i accelerate from a complete stop, my car will begin smoothly then seconds later start to shake then be perfectly smooth at high speeds (40-60mph). I have the sst one with the paddle sifters witch i never use btw but when i star to go at a complete stop ill sift from fist to second at 2500rpm perfectly smooth then second to third at round 2-2500rpm and it will slow down then speed back up to normal kinda like a slip, then every shift later is perfect, theirs 6 speeds
I have a 2009 Nissan Altima with a P0868 stored on the tcm but no MIL. Slow acceleration from standtill and cvt whine. Could it be a pressure solenoid? Or stepper motor?
Giovanny,If the secondary pressure low code is the only one being tripped, it is less likely to be a ratio control motor or pressure control solenoid issue. Have you made sure the fluid level is full? There will be often be pressure issues and a pump whine if the fluid is a couple of quarts low. You may want to clear the code and see how it drives once you verify the fluid level is correct.Thanks,Matt Johnson
@@kennedytransmissioncvtauto5430 we replaced the whole cvt assembly, VB, TCM, Accelerator position sensor, throttle body, yet it still popped up the same code. Even when we erase it from TCM it's still comes back. We did EEPROM Erase too, still showing. Theirs no engine light either. No codes for bad solenoids, stepper motor, etc. just the p0868
So o have a nissan murano 2005. I changed the trans oil and flushed it out. There were shavings all in the pan when I went to change it. I still went ahead and replaced filter and added castrol CVT oil. It ran well for 400 miles but now it wont even move and there's no check engin light to read. It reverses very slow and will barely move forward. I mean I have the petal to the ground and nothing. I check the trans presure and got only a trickle coming out. Could valve body be clogged.
Transmission getting stuck in limp mode, stuck in a low gear. Also I believe it may bounce back and forth between gears like it does not know what gear it wants to be in. If your fluid is at proper level it could be valve body issue. If you are getting engine light with error code P0845 or P0840. Nissan has put out a service bulletin recommending replacing the valve body. I believe there are a couple other codes mentioned as well. Im no expert, just from what I have learned dealing with my CVT issue.
Man thanks a bunch. My 2011 nissan rogue was making a winning sound and the paint from the bottom of the pan clogged up filter and valve body. Cleared everything and back on the road.
thenks for alle a wante to see nather type ofe geare box (cvt, .....) a student and awnt to knowe alle geare wv .range rover .. you knowe and thenks halpe me pleasse ..you are the beste
Hello, have a very important question. I bought 2016 Nissan Altima SR 4 cylinder brand new. 60,200 miles tranny failure (cvt).... I have 40,000 miles on the remann cvt Nissan put in it. It seems like around 60,000 miles these cvt”s are going out. Is there anything I can do to prolong the cvt. Fluid change???? Or they just junk and hope for the best. I drive it daily with 1-3 hour travels 5 days a week.
@Kennedy Transmission, CVT & Auto. I have 2014 Altima 2.5 and it's started to stall and stopped moving when I got it home. P0776 and P2813. I'm changing the fluid today and if that doesn't fix it, would I change the valve body with the part from the dealer for $350 because they don't sell the pressure switches individually. Thanks and awesome video
How did you make out? I had P0746. I changed fluid and fliters and it went away. Now i have P1778 code... Cant win with this damn CVT. Never will i own a vehicle with one every again!
Thanks for the video. 2008 Nissan Rogue AWD. Slow acceleration and some stuttering noticed. Transmission fluid looked clean and was full. Progressed to the point of barely inching forward from a stop (like stuck in 4th gear) and code P1778. Would that really be the stepper motor, something in the valve body, or the valve in the internal CVT pump? Or something else?
Oh I wish I lived close to you even though I'm retired the knowledge that you could impart to me would be invaluable even though I would never work on a cars transmission myself I really like to know how things work, top class information I'm hooked
do you have an email i can contact you on. im currently working on replacement of the step motor on the throttle body. i have a couple of lil parts that i have on mine. but dont see in video. was wondering if you could shine the light on where they go. my throttle body is the same as the one in the video
I opened a valvebody for an SR20 Nissan Transmission and the place where the Tcc solenoid is supposed to be there is a hole with a open/close pin inside. I am beginning to think that the TCC solenoid is missing. Also the scanner shows bad stepper motor but a multimeter shows that the wiring in the stepper motor is still good. It also shows a bad line pressure solenoid (its a older model multimeter that shows codes 000e, 000b and 000f).
Edward,I am sorry, but I am not familiar with the SR20 transmission. Could this be the SR20 Nissan engine? If this is the case, do you know which CVT it is mated to? Thanks,Matt Jonson
If you get a stepper motor code what would be the problem?..I noticed you didn't say because that's what I'm in the middle of right now.. it's got that Code. 1778..and low pressure code.... I've got the valve body out on the table right now,just replaced the stepper motor... weird thing is the car is working fine just throwing the codes it's a 2010 model without the secondary pressure switch... it would be very cool if you could get back with me in the next 3 or 4 days before I put this thing back together and let me know what I need to replace or clean or check before I put this valve body back in....thanks..
@@josedasilva4433 The pressure regulator in the pump was slightly damaged causing a fluid pressure loss which cause damage to one of the variators.... chewed up the slide bearings... I totally disassembled the transmission ordered a kit...kit was under $500 shipping and all...came with upgrade parts and an upgrade pump with a bigger pressure regulator valve in it...
@@motersickel Would you be able to send me a link to the kit you purchased? I would like to see what came with your kit. I believe this is the issue I am having with my 2011 Nissan Altima. No slipping, but it will not shift and I have a low pressure code which makes me believe it is the transmission oil pump. Belt and pulley's look like brand new, but I have not removed the transmission. I have only been able to see certain parts after the valve assembly was removed.
Got a 2008 sentra, showing p0845 code, when cleared it comes back after driving and restarting the car. I feel like the trans is shifting just fine, starts off a little slow but that's normal for a ctv. Should I just change the sensor ?
@@mdamron115 I have the same code. I have pulled out the old valve assembly, and put a referbished one in. Just waiting on a cooler filter in the mail to complete the job. I am adding an external cooler to keep the fluid cool. Will report back when its all done.
@@mdamron115 By the way, You may have another filter under the cooler which should be installed just under your Battery mount. You might also want to install an external cooler to keep the issue from coming back.
Just wondering if you guys could lend some info. I've got a 2008 Lancer GTS CVT, same model CVT as this valve body break down. I'm throwing a code P0840. My car still drives, but feels like its in limp mode all the time. I was planning on pulling the valve body to inspect everything. Any tips or things I should look for with this code? Have you guys dealt with this code often? Any help on the matter would be greatly appreciated!
With the P0840, the unit is likely defaulting (locking itself into a single ratio to avoid potentially damaging itself). I am not sure what tools you have, but I would suggest verifying the fluid level is full, documenting any other codes that may be present, clearing all the codes and driving the vehicle gently with a scan tool hooked up. You would want to monitor the pressure sensor PIDS and make sure that they are reading correctly. If the P0840 returns immediately after clearing (or simply before driving), I think a replacement of the pressure sensor would be warranted even without further testing with a DVOM. Make sure to look at the pan magnets; if the metal content is excessive, it may already be to late.Thanks,Matt Johnson
Thanks a lot for the help! I have an OBDII scanner to just check and clear codes. The P0840 is the only code that I'm throwing related to the transmission. I have a P0420 for an O2 sensor as well. I have also thrown I think a P0725 in the past, but once or twice. Some days it'll throw the code immediately when I start the car, some days it takes a couple minutes, and other days it will drive perfectly fine. I don't have any tools to monitor the pressure readout of the sensors, but I'll definitely take a look at the magnets when I pull the pan. Thanks again for the help, hopefully it's not too late!
Have you ever seen one of these transmissions have belt failure and the transmission still be good? Or is the belt failure caused by something else that has failed?
Kurt, On the Jatco CVT's, we almost always find that something else caused the belt failure. Extremely rare to see a broken belt with the rest of the unit still in good condition.
Kennedy Transmission, CVT & Auto I may be calling the parts by the wrong name but I found a failed variation pulley I replaced both pulleys and belt and as of yesterday the car is back on the road
@@kyleburt442 Hey Kyle Glad to hear your up and running again! Was it hard to rebuild the unit yourself? Watched a couple vids and doesnt seem too crazy...but i have no clue where to source parts for these...
Do you know the proper pid to read the trans temp on a jeep patriot with the CVT2L version. I know dedicated scanners can but i usually only have access to my Torque Pro app for android smartphone and a obd link mx elm bluetooth adapter
Reed,I am sorry, I am not sure how to access the temp PID on the torquepro app. I know most Chrysler's are simply is ID'd as "TFT", or Transmission Fluid Temp" on most of our scan tools. You may have to access the PID under Engine data though since your Jeep has a PCM rather than separate TCM and ECM; I know this is true for most of our scan tools.Thanks,Matt \
Kennedy Transmission, CVT & Auto Thank you Matt. The pid's available in the app as well as the supplemental downloads do not register proper readings for the CVT. I was hoping to get the right pid and then just enter the values manually in the area. Take care brother and thank you for your help and time. Love the videos, they are a invaluable tool for many.
Reed,I am sorry I am not familiar with the torquepro platform. I know we can access the TFT PID with Snap-On, Autel, OTC and OEM etc... tools we use. You may be able to get a fairly accurate reading by using an inexpensive infrared thermal gun on the pan.
Fredy,Start with any Diagnostic Trouble Codes. Stepper motor circuit codes are a higher likelihood of a failed stepper motor than performance codes. Stepper motor performance (or rationality) codes are very rarely caused by a failed stepper motor. If you have a good scan tool, you can watch the stepper motor position and make sure it is changing properly. On most Jatco units the stepper motor position ranges from 0 to 188 (on the live data you generally see only an indicated position of 5 or 7 to ~188). If the stepper motor is actuating properly, you should be able to correlate the position change with the ratio change. If the position changes as expected, but the ratio does not, it is likely something else causing the issue and not the stepper motor.Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto what aboit checking the resistance of the step motor I followed alldata said that all for pins of the cvt unit need 15 ohm , in 3 pins i got 15 but 1 is 10 ohm , that mean that the step motor is bad , i got the code p1777 , can wont move just idle
When it is bad your vehicle will lock in a ratio, for example, if it was in a 1:1 ratio when it fails, it will remain in that 1:1 ratio, its like keeping your car in 4th gear and driving, it won't cut off because of the torque converter.
Is there a special tool that you have to use to keep that linkage arm positioned while your aligning it back into the transmission case? Or can you use a drill bit, pick etc ?
@@kennedytransmissioncvtauto5430 I left a comment up there would be really cool if you could assist me I have a valve body out on a 2010 Altima laying on the table throwing p1778 code and low fluid pressure code but the car seems to be driving fairly normally so I've replaced the stepper motor but while I have this valve body out...you were saying something that that's not usually the problem?.. is there anything else I need to do before I put this valve body back in I'm not a transmission guy just a regular mechanic of 26 years... I checked that first solenoid forgot what you called it it reads 27 and some change ohms
You say the stepper motor code is not caused by a bad stepper motor. I am getting the code p1778 and planned on replacing the stepper motor to try to repair problem. I can drive as many as 250 miles in between incidents and it works perfect most of the time. Any idea why I am getting that code and what I can do to repair the problem?
P1778 could certainly be caused by a mechanically faulty stepper motor. The P1778 is a performance code rather than an electrical code, meaning the controller is commanding a certain value, but not seeing the expected result (in either ratio or primary pressure) and not detecting an electrical failure with the stepper motor. If the code were a P1777 (electrical fault on the stepper motor ckt) , the likelihood of a stepper motor failure would be higher. That being said, it would be good to get the pan down, inspect metal content and the ration control valve when you test or replace the stepper motor. With just this code, if the issue is not the stepper motor it is likely internal; something impeding proper variator operation. I hope this helps.Thanks,Matt Johnson
If we do have those codes for the circuits of the solenoids and no step motor and no check engine light, by replacing just those solenoids could fix it and get the vehicle out of limp mode? I’m currently have issues where my 07 Nissan Maxima car will jump to fifth gear at 20 mph. Am i better of replacing the cvt or could there be another route
P1778 code came up on my ‘14 Nissan Murano (bad stepper motor). Can you please elaborate on your comment that the step motor is usually not the problem?
Yep having the same problem on an Altima apparently he's not getting back to any questions anyone...as I'm not a transmission guy but have been a mechanic for over 26 years and I just am not buying a whole entire transmission when the vehicle is still driving pretty normally just throwing the stepper motor code...maybe it's a secret he don't want to tell anyone...
@@motersickel Haha I just got this code too! But car is still getting around. If anyone can chime in for this code, cause its like a secret on the net! Search for 2 days and not a fix or definite cause for it...
@@splash5974 well since this comment I have took it on myself to rebuild the transmission in the Altima and have found out it is actually pretty simple... so if you're getting that code you might want to be ready to rebuild it sometime in the future... what happens is the input variator behind the torque converter moves in and out with changes the gear ratio, well there's no actual gears it is a belt... the variator stops moving smoothly due to lack of lubrication going to the slide balls... it starts to jam up which causes a code to throw for the stepper motor that reads this movement the start of this comes from the pressure control valve in the pump gets hairline scratches in it causing a fluid pressure loss... eventually you may get a low transmission fluid pressure code people think you don't have to change the fluid and filter on these for a very long time when in fact I would do it every 30000 miles.... these Transmissions are a very good transmission they just had a few failing points whatever it takes transmission offers a overhaul kit that is also an upgrade kit ..I ordered this kit from them and a upgraded pump.... I highly recommend this kit from them....
@@motersickel Ok i was worried about it being more than just a valve body issue... Im justcabout to order a nee valbe body and swap it, but makes sense what you're saying. So the variator is damaged and not changing ratios. Thats why i can go above 45mph, cause it wont change to higher gear ratio. I seen a couple vids on rebuilding it. It doesnt look like a nightmare job! Everthing i look up for rebuild kits are just gasket kits. Where did you find a complete kit to do the rebuild? And did you do it from vids or get a manual to rebuild it?
@@motersickel I didnt get ghe actual name of the place you found the parts. You replaced everthing with new? Belt, pulleys, valve body, clutches, pump?
Thanks for the video! We have a 2016 Nissan Quest with 26k that just had a valve body replaced. I noticed that while slowing down to a stop, when the CVt would switch into it’s lower “gear” ratio (a shift that can be perceived/felt around 5-7 mph while coasting) it would make a weird crunchy/grindy noise in that ratio. The car drove fine except for this noise. I was concerned bc I have two other CVt cars that do not make this noise upon slowing down/stopping. Any idea what inside the valve body would cause this?
Anton,On the Jatco 2 speed CVT's, it is very common for the high low shift quality to take a while to adapt in well after any sort of change. I have spent hours in a couple of cases performing the relearn and then doing a ton of slow accel/ decal driving to get the shift quality to come around. That being said, I have not had any noise issues after making any valve body changes or repairs. I do not think it would be anything in the valve body at all making the noise, but the valve body controls the application of the high/ low clutch and could possibly be doing something hydraulically to cause the clutch noise. If it does not lessen soon, I would bring it back to the shop that replaced the valve body and let them hear it. I am assuming this is a new valve body installed and adapted by a dealership or someone familiar with these transmissions.Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto I meant to say that I had the noise before they replaced the valve body, I am picking up the car tomorrow so hopefully it is gone. I asked them what happened but the service gal couldnt exactly state, just said the was a TSB out for this problem or something
Anton, There are a number of technical service bulletins regarding valve body replacement on these units, but none that I have seen pertaining to noise caused by a valve body issue. I would expect that the noise has been alleviated if they are having you pick the vehicle up. Assuming so, I suspect there may be a wear issue with the valve directing pressure to the high/ low clutch. Thanks, Matt Johnson
Hello, We just put an used transmission of a 2008 Altima 2.5 engine in place of bad one. After we drove 30 feet, it gave P1777 step motor code. Instead of sending the unit back and get another one from the vendor under warranty, I am considering to change the step motor. However, in the video you say at 4:45 that a lot of times when you change the stepper motor, that is not the problem? So how can we figure out where the problem is? Also, I looked at Ebay and there are different kinds of step motor sold the same transmission when I enter Altima 2008. Some are RE0F10A, Some are RE0F10E, etc. How can I find out what kind of transmission is this? Does it say anywhere on the transmission? Basically, how can I find out which step motor needed for the transmission? Thank you in advance.
Everything I see shows the transmission as a Nissan RE0F10A (Jatco JF011E). Often times stepper motor DTC's are set by issues other than the stepper motor. However, with just a P1777 (circuit fault), there is a reasonable likelihood that this is just a stepper motor failure. Before going any further though, you should check your harness connection and pin tensions, clear the code and see if it returns. If it does, you may want to just install the stepper motor from the original transmission and test from there; unless you suspect it was the cause of failure. We have not had good luck with used CVT's and quit doing them all together a few years ago. Hopefully, the stepper motor (if needed) from the old unit will take care of the issue.Thanks,Matt Johnson
Thank you for your response. The weird thing is the code does not erase. You turn the key to on position, engine off. Erase. And when you read again, it is still there. Could not make it go away. The bad thing is this is the third transmission I put on this car. And I sent the original back, long time ago as core.
Assuming your scan tool is getting the code to clear, it is likely a short or open in the stepper motor circuit that is instantly re-setting the code on key up. When the code returns instantly on key up, it points towards a stepper motor failure.Thanks,Matt Johnson
Yeah, that is the case. I erase the code. Turn the key off, turn it on without starting the engine and the code is still there. So I guess I need to change the stepper motor. Thank you for your response.
About that computer: I got a used cvt transmission valve body to replace the original cvt valve body on my car. In order to make it work, I need to put the computer on my original valve body to the newly bought valve body before I put the 'new' valve body to my car. Otherwise, my car will not run after the valve body replacement because my car's TCM won't recognize the 'new' valve body. Right?
Giovanny,Yes, you can re-flash the replacement module if you have access to a Consult, or simply have the Nissan dealership flash it.Thanks,Matt Johnson
What is your location? I am in SW Missouri. USA I own a 2011 jeep patriot latitude 4x4 with a cvt. Did a fluid filter change after the over temp light came on, it ran well, for 6 or 8 thousand miles, now it whines and surges. Suggestions are welcome, I do most of my own work, but a auto trans rebuild is something I have not done. I would try it if I knew what to replace, it does drive it just can seem to decide what ratio to stay in, it slips around in manual mode as well. Thanks
Dan, We are in Minneapolis, MN. When you replaced the filter, was there a lot of metal on the magnet or in the filter screen, or a lot of clutch material in the pan? Have you had the Jeep scanned for codes? The issue may be related to the valve body, stepper motor or pressure control solenoid, but the whining makes me concerned the issue may be internal. Did you use OEM CVT fluid?Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto Yes the magnets were furry the oil in the pan seemed inundated with fine metal. It ran well after the oil change, I used valvoline cvt. Thank you for the reply.
Dan,Given the noise and the metal content, it really sounds like a bearing is failing. When the bearing starts shedding metal, that often causes scoring on the pump flow control valve which in turn causes a lack of proper ratio change. Unfortunately, I think the unit will likely have to come out and be rebuilt.Thanks,Matt Johnson
Dan,I am sorry, I do not stock any pre-built units. If rebuilding is necessary, we overhaul the vehicle's transmission. This allows us to save the vehicle's ROM and avoid needing to re-flash.
Great information that helped me rebuild my valve body after accidentally separating and losing the balls and not knowing where they went inside. Thanks for sharing your knowledge for DIY garage mechanics like myself.
Really want to attack this DIY, getting much egde to attack this with this video and your comment.
Happened to me today smh 🤦🏾 😪 lucky this guy made this diy in depth great content!!
All you guys making vids for these CVTs and sharing the common problems are serious mechanical-saints! Man, I just want to slap you back so hard and give ya a shaking side hug! You’re awesome! Saved me from a raging fit. You give me hope like saving my religion! Fist bump the air as I declare, true heroes!
Those two tiny rectangle filters were missing in my 2012 valve body is that normal or did I lose them both?
2 questions for you.
1. What do you think about adding coolers for CTV transmissions?
2. Nissan CVT fluid. Nissan brand fluid is very expensive, I have a nissan second hand and it is way past warranty. I am getting ready to replace the valve body. Are there quality Non Nissan brand CVT fluids I can use, Any recommendations on which are good or what to stay away from?
Thanks for the video by the way, you answered something I was confused on, why some of the replacement valve bodies come with wiring for only one of the sensors, You mentioned prior to 2010. I was going to pull mine out before ordering a new one to see if it had one or 2 sensors hooked up, I am assuming now it is going to be 2.
You LITERALLY SAVED MY LIFE WITH THIS VIDEO THANKS A MILLION FROM ONE TECH TO ANOTHER ‼️‼️‼️ Blessings!!✅️✅️💯👨🏾🔧🙏🏾🙏🏾🙏🏾
I have a 2011 AWD Tuned Juke and I am starting to get nervous.. I feel the slack in the belt now. If I throw her in sport mode it titans back up but it's getting there.. I found a Brand New CVT fresh in the Box for my Make and Model yesterday for $5500 uninstalled.. Sounds about right..
Not a transmission guy here so from what I understand I can just swap the small black computer off the valve body out of my wife's jeep and Install it in a new valve body and put it back in the Jeep and shouldn't have to program anything?
My 07 patriot in limp life P0700 transmission Control System mil and incorrect gear ratio would that be from a bad valve body it won’t shift pass second it will tack out the rpm
I bought a refurbished valve body for my 2011 Mitsubishi Outlander Sport and it comes with the computer. Do I need to replace the computer with the one from my old valve body?
You are a genius my friend!! Great job!!
When putting the "entire" valvebody back in can you still use the drill bit to line up the ratio control arm? I didnt see any other video going further into detail on that or any video on UA-cam and I'm kinda stuck at this part
Did you ever figure it out? Struggling with this right now
@@project4funner anything?
@@project4funner you pull the arm all the way back and you will notice a small hole that goes straight through the valve body. Place a hair pin or something small in there to keep the arm from moving back. Install the valve body and remove the pin.
@@dwaynedumas5278 thanks for the explanation. I had been having a real hard time trying to get it in place with flat shim stock from above while installing. Should have known there was a better way
@@dwaynedumas5278 i have seen another video, who placed a pin wire but after completing from assembling, he havnt removed the pin, i dont know he forgot or it must not be removed
On minutes 4:03 you put a spring that came out of the valve body and I couldn’t figure out where is it goes abd the stupid mechanic put it on a different place of the valve body ow I need to replace it , where can I buy it. Thank you
Awesome video. Helped me to be able to put everything back in the tight places
I have a 2012 altima 2.5L , does anyone know the part number for the whole valve body? Mine is reading "p1178, transmission reverse i/p circuit malfunction ". Please help
GIVE DEALER YOUR VIN NUMBER
Just search JFO11E or REOF10A
does anyone know what size of 11 bolts are that keep together the valve body to the body of transmission?
What if i accidentally left out the pop valve and the screens afterbi replaced the step motor?..could that cause my car car to not shift gears?
So if you are thrown a P1778 stepper motor code, and replacing the stepper motor will not fix the issue, what exactly is the issue and what needs to be replaced?
Exactly what I'd like to know...
Apparently nobody talks about a fix for it.
Im in the same situation p1778
@@fervienteteocrata1915
I had to replace the transmission. Car runs like new now!
I lost one of the check valve balls does the valve body need this
😂😂😂
You know it does
Order it online
Excellent job , a layer of plywood on the table could reduce stress , ✌
That part is all cvt proplems
Ya whatever seems like a lot of crap for a vari drive
I have p0744 was told to replace the TCC
Hi i have a 2016 altima sr with 46k after towing it with all the 4 tires on the ground with shipping mode engaged. It will not move fwd or back i have p0746-00 p0848-00 p0965-00 p2765-00 any help would be appreciated
Are you AVE's twin?
josh bishop - LOL! The similarity of his voice had me wondering if this was AVE's real channel and his whole hilarious canadian mech-tech-nerd goofball persona was just an act for youtube glory!
And to Mr. Kennedy, if you don't know who AVE is, just search his channel on youtube... He sounds JUST like you in tonality and similar in speaking tempo, but with a Canadian flair. :-)
orcoastgreenman lol, "Canadian flair". But yeah, definitely search AVE if you've never seen one of his videos.
This a great video Kennedy, thank you for posting. I have issues with my valve body after changing the stepper motor on a 2008 Nissan Sentra doesn’t want to back up, I notice that small round black plastic cylinder came out of the valve body, it looks like strainer or filter, and the mechanic not just put it in the wrong place but also broke it, now I am wondering where can I buy it that small cylinder and where exactly goes. In minute 3:32 you removed some of those cylinder but I couldn’t quite see the shape of them, there is anyway you can help me to figure out where that cylinder goes, also another metal cylinder that goes with spring on it came out and no idea where is it goes. Thank you
2012 suziki sx4 wont go pass 20mph. Gives p0777 code. I changed the 1st 4 solenoids you showed on the video with no luck. What could cause this? Also chaed the transmission fluid.
Does the valve body need to be reprogram
Thank you very much. I did not realize I took apart too many bolts and it came apart in sections so trying to figure out what those balls went was a big help I've learned my lesson. Lol thank you big time. What causes that plunger where that stepper motor attaches to to get jammed up because on my I literally had to use a hammer to get that plunger to come out and it's very stuck
hai, mine is 2013 Nissan altima. especially in winter, for the firs 4 to 5 km of each drive. car runs very slow, 30km speed at 2000 RPM.(I can feel the lack of power). once the engine is hot, after 5km. immediately the transmission will properly engaged to engine and run normal. In 2018, I changed transmission, but the same problem is still exist. could you please explain me what is the real issue. Nissan dont want to help me more. would you please advise me. thanks.
Hay jeff i have a 2010 Mitsubishi lancer gts with a cvt jatco. When i accelerate from a complete stop, my car will begin smoothly then seconds later start to shake then be perfectly smooth at high speeds (40-60mph). I have the sst one with the paddle sifters witch i never use btw but when i star to go at a complete stop ill sift from fist to second at 2500rpm perfectly smooth then second to third at round 2-2500rpm and it will slow down then speed back up to normal kinda like a slip, then every shift later is perfect, theirs 6 speeds
I have a 2009 Nissan Altima with a P0868 stored on the tcm but no MIL. Slow acceleration from standtill and cvt whine. Could it be a pressure solenoid? Or stepper motor?
When I restart the car, it accelerates normally then after a few minutes, it goes back to the delayed acceleration. No codes other than P0868.
Giovanny,If the secondary pressure low code is the only one being tripped, it is less likely to be a ratio control motor or pressure control solenoid issue. Have you made sure the fluid level is full? There will be often be pressure issues and a pump whine if the fluid is a couple of quarts low. You may want to clear the code and see how it drives once you verify the fluid level is correct.Thanks,Matt Johnson
@@kennedytransmissioncvtauto5430 we replaced the whole cvt assembly, VB, TCM, Accelerator position sensor, throttle body, yet it still popped up the same code. Even when we erase it from TCM it's still comes back. We did EEPROM Erase too, still showing. Theirs no engine light either. No codes for bad solenoids, stepper motor, etc. just the p0868
@@kennedytransmissioncvtauto5430 fluid pressure is good. And full yes.
So o have a nissan murano 2005. I changed the trans oil and flushed it out. There were shavings all in the pan when I went to change it. I still went ahead and replaced filter and added castrol CVT oil. It ran well for 400 miles but now it wont even move and there's no check engin light to read. It reverses very slow and will barely move forward. I mean I have the petal to the ground and nothing. I check the trans presure and got only a trickle coming out. Could valve body be clogged.
Would this valve body also fit on a 2012 Nissan Sentra 2.0L??
Great video, what are symptoms of a bad valve body?
Transmission getting stuck in limp mode, stuck in a low gear. Also I believe it may bounce back and forth between gears like it does not know what gear it wants to be in. If your fluid is at proper level it could be valve body issue. If you are getting engine light with error code P0845 or P0840. Nissan has put out a service bulletin recommending replacing the valve body. I believe there are a couple other codes mentioned as well. Im no expert, just from what I have learned dealing with my CVT issue.
@@JohnNorris411 Please help, haviung the same problem with exact codes
Question I have a 2008 Nissan rogue sl AWD and I have two pressure switchs?? Shouldn't it have one?
...you da man pimp!
Man thanks a bunch. My 2011 nissan rogue was making a winning sound and the paint from the bottom of the pan clogged up filter and valve body. Cleared everything and back on the road.
Would replacing the valve body fix the P0841 code?
thenks for alle
a wante to see nather type ofe geare box (cvt, .....) a student and awnt to knowe alle geare wv .range rover .. you knowe and thenks halpe me pleasse ..you are the beste
Can the valve body cause over heating.? If yes which valve is the causes and which valves offen get worn out the most.
The jf011e is fit for 2011 Jeep patriot ?
Yes. Same one is used from 07 to 17.
Hello, have a very important question. I bought 2016 Nissan Altima SR 4 cylinder brand new. 60,200 miles tranny failure (cvt).... I have 40,000 miles on the remann cvt Nissan put in it. It seems like around 60,000 miles these cvt”s are going out. Is there anything I can do to prolong the cvt. Fluid change???? Or they just junk and hope for the best. I drive it daily with 1-3 hour travels 5 days a week.
Sorry sir. Jatco makes horrible transmissions. Dont buy a nissan with an automatic/CVT.
Where are the (4) ball bearing thats inside the body at? Did you re install those back into the body?
Lost boths screens. Can i still drive without causing damage
Number one
@Kennedy Transmission, CVT & Auto. I have 2014 Altima 2.5 and it's started to stall and stopped moving when I got it home. P0776 and P2813. I'm changing the fluid today and if that doesn't fix it, would I change the valve body with the part from the dealer for $350 because they don't sell the pressure switches individually. Thanks and awesome video
How did you make out?
I had P0746. I changed fluid and fliters and it went away.
Now i have P1778 code...
Cant win with this damn CVT.
Never will i own a vehicle with one every again!
where's place tcm with cvt jf011e for dodge caliber please (p0700)
If it shows a stepper motor code how is the stepper motor not the problem?
Thanks for the video. 2008 Nissan Rogue AWD. Slow acceleration and some stuttering noticed. Transmission fluid looked clean and was full. Progressed to the point of barely inching forward from a stop (like stuck in 4th gear) and code P1778. Would that really be the stepper motor, something in the valve body, or the valve in the internal CVT pump? Or something else?
What was the cause of your P1778?
I just got that code, but car runs good up untill its supposed to shift from 3rd to 4th...
I have 2014 Nissan Murano and it throws the code p1778 what this code mean .....thanks
Did you figure out the cause?
Oh I wish I lived close to you even though I'm retired the knowledge that you could impart to me would be invaluable even though I would never work on a cars transmission myself I really like to know how things work, top class information I'm hooked
Where can i order those 2. Screens. Can't find them
do you have an email i can contact you on. im currently working on replacement of the step motor on the throttle body. i have a couple of lil parts that i have on mine. but dont see in video. was wondering if you could shine the light on where they go. my throttle body is the same as the one in the video
I opened a valvebody for an SR20 Nissan Transmission and the place where the Tcc solenoid is supposed to be there is a hole with a open/close pin inside. I am beginning to think that the TCC solenoid is missing. Also the scanner shows bad stepper motor but a multimeter shows that the wiring in the stepper motor is still good. It also shows a bad line pressure solenoid (its a older model multimeter that shows codes 000e, 000b and 000f).
Edward,I am sorry, but I am not familiar with the SR20 transmission. Could this be the SR20 Nissan engine? If this is the case, do you know which CVT it is mated to? Thanks,Matt Jonson
Does this gear is the same in compass trailhawk 4*4 2018?
If you get a stepper motor code what would be the problem?..I noticed you didn't say because that's what I'm in the middle of right now.. it's got that Code. 1778..and low pressure code.... I've got the valve body out on the table right now,just replaced the stepper motor... weird thing is the car is working fine just throwing the codes it's a 2010 model without the secondary pressure switch... it would be very cool if you could get back with me in the next 3 or 4 days before I put this thing back together and let me know what I need to replace or clean or check before I put this valve body back in....thanks..
hi, did you ever figure this out? thanks
@@josedasilva4433 The pressure regulator in the pump was slightly damaged causing a fluid pressure loss which cause damage to one of the variators.... chewed up the slide bearings... I totally disassembled the transmission ordered a kit...kit was under $500 shipping and all...came with upgrade parts and an upgrade pump with a bigger pressure regulator valve in it...
@@motersickel Would you be able to send me a link to the kit you purchased? I would like to see what came with your kit. I believe this is the issue I am having with my 2011 Nissan Altima. No slipping, but it will not shift and I have a low pressure code which makes me believe it is the transmission oil pump. Belt and pulley's look like brand new, but I have not removed the transmission. I have only been able to see certain parts after the valve assembly was removed.
Got a 2008 sentra, showing p0845 code, when cleared it comes back after driving and restarting the car. I feel like the trans is shifting just fine, starts off a little slow but that's normal for a ctv. Should I just change the sensor ?
Go look up the Nissan service bulletin for that error code.
@@JohnNorris411 changed the sensor, filter, and fluid, code went away
@@mdamron115 I have the same code. I have pulled out the old valve assembly, and put a referbished one in. Just waiting on a cooler filter in the mail to complete the job. I am adding an external cooler to keep the fluid cool. Will report back when its all done.
@@mdamron115 By the way, You may have another filter under the cooler which should be installed just under your Battery mount. You might also want to install an external cooler to keep the issue from coming back.
@@JohnNorris411 How did it go? You got it fix by the refurblish one?
Do I need to reprogram anything if I swap valve body and solenoids?
Did you get it done?
Is this part same for the 3.5 litre one?
can I take the programable part to a dealer or do I need to take the whole car?
Just wondering if you guys could lend some info. I've got a 2008 Lancer GTS CVT, same model CVT as this valve body break down. I'm throwing a code P0840. My car still drives, but feels like its in limp mode all the time. I was planning on pulling the valve body to inspect everything. Any tips or things I should look for with this code? Have you guys dealt with this code often? Any help on the matter would be greatly appreciated!
With the P0840, the unit is likely defaulting (locking itself into a single ratio to avoid potentially damaging itself). I am not sure what tools you have, but I would suggest verifying the fluid level is full, documenting any other codes that may be present, clearing all the codes and driving the vehicle gently with a scan tool hooked up. You would want to monitor the pressure sensor PIDS and make sure that they are reading correctly. If the P0840 returns immediately after clearing (or simply before driving), I think a replacement of the pressure sensor would be warranted even without further testing with a DVOM. Make sure to look at the pan magnets; if the metal content is excessive, it may already be to late.Thanks,Matt Johnson
Thanks a lot for the help! I have an OBDII scanner to just check and clear codes. The P0840 is the only code that I'm throwing related to the transmission. I have a P0420 for an O2 sensor as well. I have also thrown I think a P0725 in the past, but once or twice. Some days it'll throw the code immediately when I start the car, some days it takes a couple minutes, and other days it will drive perfectly fine. I don't have any tools to monitor the pressure readout of the sensors, but I'll definitely take a look at the magnets when I pull the pan. Thanks again for the help, hopefully it's not too late!
@@InfusedGamers hey man did you ever find what was the problem I’m running the same issue with the same car and model any help I do appreciate
Thanks for the video
Have you ever seen one of these transmissions have belt failure and the transmission still be good? Or is the belt failure caused by something else that has failed?
Kurt,
On the Jatco CVT's, we almost always find that something else caused the belt failure. Extremely rare to see a broken belt with the rest of the unit still in good condition.
Kennedy Transmission, CVT & Auto I may be calling the parts by the wrong name but I found a failed variation pulley I replaced both pulleys and belt and as of yesterday the car is back on the road
@@kyleburt442
Hey Kyle
Glad to hear your up and running again! Was it hard to rebuild the unit yourself? Watched a couple vids and doesnt seem too crazy...but i have no clue where to source parts for these...
Nice vídeo man, nice vídeo!!!
Where do you get your info?
Really good
Do you know the proper pid to read the trans temp on a jeep patriot with the CVT2L version. I know dedicated scanners can but i usually only have access to my Torque Pro app for android smartphone and a obd link mx elm bluetooth adapter
Reed,I am sorry, I am not sure how to access the temp PID on the torquepro app. I know most Chrysler's are simply is ID'd as "TFT", or Transmission Fluid Temp" on most of our scan tools. You may have to access the PID under Engine data though since your Jeep has a PCM rather than separate TCM and ECM; I know this is true for most of our scan tools.Thanks,Matt \
Kennedy Transmission, CVT & Auto Thank you Matt. The pid's available in the app as well as the supplemental downloads do not register proper readings for the CVT. I was hoping to get the right pid and then just enter the values manually in the area. Take care brother and thank you for your help and time. Love the videos, they are a invaluable tool for many.
Reed,I am sorry I am not familiar with the torquepro platform. I know we can access the TFT PID with Snap-On, Autel, OTC and OEM etc... tools we use. You may be able to get a fairly accurate reading by using an inexpensive infrared thermal gun on the pan.
Sir
what about P0784
How do you know when a step motor is bad, what readings should I get when testing it?
By the way great video !
Fredy,Start with any Diagnostic Trouble Codes. Stepper motor circuit codes are a higher likelihood of a failed stepper motor than performance codes. Stepper motor performance (or rationality) codes are very rarely caused by a failed stepper motor. If you have a good scan tool, you can watch the stepper motor position and make sure it is changing properly. On most Jatco units the stepper motor position ranges from 0 to 188 (on the live data you generally see only an indicated position of 5 or 7 to ~188). If the stepper motor is actuating properly, you should be able to correlate the position change with the ratio change. If the position changes as expected, but the ratio does not, it is likely something else causing the issue and not the stepper motor.Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto what aboit checking the resistance of the step motor I followed alldata said that all for pins of the cvt unit need 15 ohm , in 3 pins i got 15 but 1 is 10 ohm , that mean that the step motor is bad , i got the code p1777 , can wont move just idle
When it is bad your vehicle will lock in a ratio, for example, if it was in a 1:1 ratio when it fails, it will remain in that 1:1 ratio, its like keeping your car in 4th gear and driving, it won't cut off because of the torque converter.
Is there a special tool that you have to use to keep that linkage arm positioned while your aligning it back into the transmission case? Or can you use a drill bit, pick etc ?
A drill bit works fine.Thanks,Matt
@@kennedytransmissioncvtauto5430 I left a comment up there would be really cool if you could assist me I have a valve body out on a 2010 Altima laying on the table throwing p1778 code and low fluid pressure code but the car seems to be driving fairly normally so I've replaced the stepper motor but while I have this valve body out...you were saying something that that's not usually the problem?.. is there anything else I need to do before I put this valve body back in I'm not a transmission guy just a regular mechanic of 26 years... I checked that first solenoid forgot what you called it it reads 27 and some change ohms
You say the stepper motor code is not caused by a bad stepper motor. I am getting the code p1778 and planned on replacing the stepper motor to try to repair problem. I can drive as many as 250 miles in between incidents and it works perfect most of the time. Any idea why I am getting that code and what I can do to repair the problem?
P1778 could certainly be caused by a mechanically faulty stepper motor. The P1778 is a performance code rather than an electrical code, meaning the controller is commanding a certain value, but not seeing the expected result (in either ratio or primary pressure) and not detecting an electrical failure with the stepper motor. If the code were a P1777 (electrical fault on the stepper motor ckt) , the likelihood of a stepper motor failure would be higher. That being said, it would be good to get the pan down, inspect metal content and the ration control valve when you test or replace the stepper motor. With just this code, if the issue is not the stepper motor it is likely internal; something impeding proper variator operation. I hope this helps.Thanks,Matt Johnson
If we do have those codes for the circuits of the solenoids and no step motor and no check engine light, by replacing just those solenoids could fix it and get the vehicle out of limp mode? I’m currently have issues where my 07 Nissan Maxima car will jump to fifth gear at 20 mph. Am i better of replacing the cvt or could there be another route
How much metal is ok?
How did you make out?
I got the same code, but car is driveable! Im getting scared after reading all the horror stories...
If I replace the valve body, do I need to switch the CPU from the old one?
THE ROM? YES
Yes, they call it the ROM read only memory small black square made to the harness.
P1778 code came up on my ‘14 Nissan Murano (bad stepper motor). Can you please elaborate on your comment that the step motor is usually not the problem?
Yep having the same problem on an Altima apparently he's not getting back to any questions anyone...as I'm not a transmission guy but have been a mechanic for over 26 years and I just am not buying a whole entire transmission when the vehicle is still driving pretty normally just throwing the stepper motor code...maybe it's a secret he don't want to tell anyone...
@@motersickel
Haha
I just got this code too! But car is still getting around.
If anyone can chime in for this code, cause its like a secret on the net!
Search for 2 days and not a fix or definite cause for it...
@@splash5974 well since this comment I have took it on myself to rebuild the transmission in the Altima and have found out it is actually pretty simple... so if you're getting that code you might want to be ready to rebuild it sometime in the future... what happens is the input variator behind the torque converter moves in and out with changes the gear ratio, well there's no actual gears it is a belt... the variator stops moving smoothly due to lack of lubrication going to the slide balls... it starts to jam up which causes a code to throw for the stepper motor that reads this movement the start of this comes from the pressure control valve in the pump gets hairline scratches in it causing a fluid pressure loss... eventually you may get a low transmission fluid pressure code people think you don't have to change the fluid and filter on these for a very long time when in fact I would do it every 30000 miles.... these Transmissions are a very good transmission they just had a few failing points whatever it takes transmission offers a overhaul kit that is also an upgrade kit ..I ordered this kit from them and a upgraded pump.... I highly recommend this kit from them....
@@motersickel
Ok i was worried about it being more than just a valve body issue...
Im justcabout to order a nee valbe body and swap it, but makes sense what you're saying. So the variator is damaged and not changing ratios. Thats why i can go above 45mph, cause it wont change to higher gear ratio.
I seen a couple vids on rebuilding it. It doesnt look like a nightmare job! Everthing i look up for rebuild kits are just gasket kits. Where did you find a complete kit to do the rebuild? And did you do it from vids or get a manual to rebuild it?
@@motersickel
I didnt get ghe actual name of the place you found the parts.
You replaced everthing with new?
Belt, pulleys, valve body, clutches, pump?
Thanks for the video! We have a 2016 Nissan Quest with 26k that just had a valve body replaced. I noticed that while slowing down to a stop, when the CVt would switch into it’s lower “gear” ratio (a shift that can be perceived/felt around 5-7 mph while coasting) it would make a weird crunchy/grindy noise in that ratio. The car drove fine except for this noise. I was concerned bc I have two other CVt cars that do not make this noise upon slowing down/stopping. Any idea what inside the valve body would cause this?
Anton,On the Jatco 2 speed CVT's, it is very common for the high low shift quality to take a while to adapt in well after any sort of change. I have spent hours in a couple of cases performing the relearn and then doing a ton of slow accel/ decal driving to get the shift quality to come around. That being said, I have not had any noise issues after making any valve body changes or repairs. I do not think it would be anything in the valve body at all making the noise, but the valve body controls the application of the high/ low clutch and could possibly be doing something hydraulically to cause the clutch noise. If it does not lessen soon, I would bring it back to the shop that replaced the valve body and let them hear it. I am assuming this is a new valve body installed and adapted by a dealership or someone familiar with these transmissions.Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto I meant to say that I had the noise before they replaced the valve body, I am picking up the car tomorrow so hopefully it is gone. I asked them what happened but the service gal couldnt exactly state, just said the was a TSB out for this problem or something
Anton, There are a number of technical service bulletins regarding valve body replacement on these units, but none that I have seen pertaining to noise caused by a valve body issue. I would expect that the noise has been alleviated if they are having you pick the vehicle up. Assuming so, I suspect there may be a wear issue with the valve directing pressure to the high/ low clutch. Thanks, Matt Johnson
Kennedy Transmission, CVT & Auto like
Could be a bad high speed sensor you will damage the trans if driven with this not working or they need to do a better job reprogramming.
Hello,
We just put an used transmission of a 2008 Altima 2.5 engine in place of bad one.
After we drove 30 feet, it gave P1777 step motor code. Instead of sending the unit back and get another one from the vendor under warranty, I am considering to change the step motor. However, in the video you say at 4:45 that a lot of times when you change the stepper motor, that is not the problem?
So how can we figure out where the problem is?
Also, I looked at Ebay and there are different kinds of step motor sold the same transmission when I enter Altima 2008. Some are RE0F10A, Some are RE0F10E, etc. How can I find out what kind of transmission is this? Does it say anywhere on the transmission? Basically, how can I find out which step motor needed for the transmission?
Thank you in advance.
Everything I see shows the transmission as a Nissan RE0F10A (Jatco JF011E). Often times stepper motor DTC's are set by issues other than the stepper motor. However, with just a P1777 (circuit fault), there is a reasonable likelihood that this is just a stepper motor failure. Before going any further though, you should check your harness connection and pin tensions, clear the code and see if it returns. If it does, you may want to just install the stepper motor from the original transmission and test from there; unless you suspect it was the cause of failure. We have not had good luck with used CVT's and quit doing them all together a few years ago. Hopefully, the stepper motor (if needed) from the old unit will take care of the issue.Thanks,Matt Johnson
Thank you for your response. The weird thing is the code does not erase. You turn the key to on position, engine off. Erase. And when you read again, it is still there. Could not make it go away.
The bad thing is this is the third transmission I put on this car. And I sent the original back, long time ago as core.
Assuming your scan tool is getting the code to clear, it is likely a short or open in the stepper motor circuit that is instantly re-setting the code on key up. When the code returns instantly on key up, it points towards a stepper motor failure.Thanks,Matt Johnson
Yeah, that is the case. I erase the code. Turn the key off, turn it on without starting the engine and the code is still there. So I guess I need to change the stepper motor. Thank you for your response.
Hello auto master , so did the step motor fix your issue , having same problem thankyou!
About that computer: I got a used cvt transmission valve body to replace the original cvt valve body on my car. In order to make it work, I need to put the computer on my original valve body to the newly bought valve body before I put the 'new' valve body to my car. Otherwise, my car will not run after the valve body replacement because my car's TCM won't recognize the 'new' valve body. Right?
Xiaomin, Correct, you can swap the vehicle's OEM RAM card to the valve body you are installing. Thanks,Matt
@@kennedytransmissioncvtauto5430 what if you don't swap the RAM? Would a reprogram of the TCM be sufficient?
Giovanny,Yes, you can re-flash the replacement module if you have access to a Consult, or simply have the Nissan dealership flash it.Thanks,Matt Johnson
What is your location? I am in SW Missouri. USA
I own a 2011 jeep patriot latitude 4x4 with a cvt. Did a fluid filter change after the over temp light came on, it ran well, for 6 or 8 thousand miles, now it whines and surges. Suggestions are welcome, I do most of my own work, but a auto trans rebuild is something I have not done.
I would try it if I knew what to replace, it does drive it just can seem to decide what ratio to stay in, it slips around in manual mode as well.
Thanks
Dan, We are in Minneapolis, MN. When you replaced the filter, was there a lot of metal on the magnet or in the filter screen, or a lot of clutch material in the pan? Have you had the Jeep scanned for codes? The issue may be related to the valve body, stepper motor or pressure control solenoid, but the whining makes me concerned the issue may be internal. Did you use OEM CVT fluid?Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto
Yes the magnets were furry the oil in the pan seemed inundated with fine metal.
It ran well after the oil change, I used valvoline cvt.
Thank you for the reply.
Dan,Given the noise and the metal content, it really sounds like a bearing is failing. When the bearing starts shedding metal, that often causes scoring on the pump flow control valve which in turn causes a lack of proper ratio change. Unfortunately, I think the unit will likely have to come out and be rebuilt.Thanks,Matt Johnson
Kennedy Transmission, CVT & Auto
Ok, thank you for your time. How much do you charge, plus shipping to Joplin Mo.
Dan,I am sorry, I do not stock any pre-built units. If rebuilding is necessary, we overhaul the vehicle's transmission. This allows us to save the vehicle's ROM and avoid needing to re-flash.