In the end remember this: You can add friction modifier to any axle and no harm will be done but if you don't add friction modifier and the differential ends up being a limited slip unit, damage will occur. So if you are still unsure if your axle requires friction modifier after this video it is better to be safe than sorry and just add one entire bottle with your new axle fluid. Ford Friction Modifier (most axles only require one bottle)- amzn.to/2EajfDD
@@FordTechMakuloco what took the brunt of damage, the friction discs? Tens of thousands of miles maybe 100,000. I was fascinated with this additive in our posi rear ends. Thank you
@@FordTechMakuloco hello my friend, how do I know what type of oil does my f150 use on the differential??? Is there a way to know, or if you can tell me it will be great.. thank you.
@@kevinoneill41 My truck is RWD only. I have never gotten stuck with it, but don’t go doing any true off-road either. But I do live in Canada with bad winters and with the rear Trutrac and snow tires; I have no issues in driving through unplowed roads that stop other vehicles. I found it to be a very worthwhile upgrade. I have tested it where one wheel is on ice and the other on clear road and the truck accelerates as though both wheels were on dry pavement. I can tell when it may be time to change the diff fluid because I will start to feel a bit of a binding when doing sharp turns. Only negative I would say for it is the fact you can’t run synthetic diff oil and in the cold I can feel how much thicker the oil is before it warms up. And in general, I would say the truck took a small hit in fuel economy because of that.
"...This right here is what they call a conventional differential or OPEN differential and is NOT because the cover's off..." . . . that made me chuckle, LOL. 🤣 Good work, Mr Brian ! 👍😎
I recently got myself a new-to-me 2011 F150 XLT EB, and I have found your videos to be the most informative of them all. I'm not an automotive nerd by any stretch of the imagination, but I am a big time DIYer and your videos are so very helpful!
Nice vid thanks. Basically in a nutshell if both wheels turn the same way you need friction modifier added in when changing the rear differential fluid
Perfecto. Simple and easy to understand. I have a 2015 EcoBoost and I find your videos helpful from time to time! Preventive maintenance! The only problem I’ve had with my truck in its 135k is the darn Lariat dual climate actuators and the expansion valve for the A/C in the firewall has gone out twice.
Great video, used the fluid change vid to change the fluid in my 14 F350 SD and now my 05 F150. Each have a (what I call ) a timing wheel on the left side. The 14 looks to be the electronic lock Dif. I bought the 150 with a 3.55 limited slip. Nice to know that there is no harm done by adding friction modifier!
Changed my differential oil on my 2010 F150 and got further confused about the friction modifier because I thought I had the locking diff, but it was a locking Transfer Case that connects the front dif to the rear dif. Never had so much overthinking involved in an oil change before! Mine was the FX4 which was advertised as a limited slip so I went with the friction modifier. Like he says, the modifier won't hurt if it doesn't need it, but if you're trying to debate ordering some for your change Ford advertises the heck out of the locking rear differential but makes almost no mention of the Transfer Case lock, and they look the same on the 4H 4L switch. I referenced the video you made about the differential change and you showed it as an electronic locking but the electric switch looked different than in this video with the newer model. Thanks for all your video's hoping my F150 will last years and years. 2010 FX4 5.4L Super Crew
I’m getting a new F-350 SRW by the end of this year. I live in N Ohio. I pull relatively light trailers 10,000-16,000 lbs. I’m on ice and snow a few weeks of the year but mostly damp/wet roads. I’m a developer builder and am off road almost every day but the worse case scenario is a job site with no gravel set where the future road will be. I’ve had lockers for a long time and have an older 07 F-150 KR 4x4 with a limited slip. I had that rear end serviced (oil changed) and they forgot to put in the friction modifier….. now the rear end whines a little all the time.
The manual is great reference, but ford might have made changes for the type oil that goes in the rear diff, if you go to the dealership, using the vin # , they would tell you the latest and greatest fluid type, with the rear diff there has been some changes in type of fluid. Great Content
Thanks for the info! So what's better - electronic locking or a limited slip dif? On a side note - I'm guilty too, but manual says never to jack up the car by the rear dif :)
Thank you so much, I was going crazy trying to figure this out, 01 f150 super crew - rear V941A 3L55 975. Your insight and knowledge help me determine min is a limited slip and I need that additive.
My manual empized never raise the rear axle with a floor jack under differential. The cover could become distorted or cracked. I did it because I saw several videos showed it and it is now leaking fluids by the buckets. I was very careful, but I now have to buy a new cover and hope that will cure the problem.
......so,... I changed my gear lube a couple months ago, and recently it started grabbing when accelerating from a turn. I THOUGHT it was an open diff, but the wheels turn the same direction when suspended, so.... I ordered the friction modifier just now. Will I see any long term damage from driving this way?? I honestly did not think it was a limited slip. Man, what a timely video.....!!
@@FordTechMakuloco Yes, I put the magic juice in a couple weeks ago- it seems to be MUCH quieter now. Thanks SO MUCH for all your great videos- I have learned a TON!!
Hi Brian ...I've have learned so much from you I feel I should send you a check...lol..they don't teach some the things you've shown us the way you do ... I Enjoy your videos... Cheers 🍻🍻🍻🇺🇸🇺🇸
Master chief, would you say that those taking 75W90 are possibly rebuilt? Seeing that original 03 F150 5.4l 2V calls out 75W140? Jeremy. (I just acquired this truck and rear axle has overlabel and tabs on diff case cover that call out 75W90 only)
@@acts2211 > best to listen to what da man said.....when back there, it's better to be safe and use a friction modifier on any model of rear, to prevent catastrophic damage....lol.
Good videos as always. A point of experience. A limited slip differential will oftsn spin the opposite direction of the tire you are turning. It's better to leave one wheel on the ground and you notice you can't spin the wheel that off the ground.
A limited slip is locked together so they spin together, you are thinking of an open diff. This video is to show you what diff you have not if your limited slip diff is worn out which is the test you are speaking of.
@@FordTechMakuloco Now i'm confused. I changed my diff fluid in my 2010 F150 and the Axel code is H9, which is LS, However when I preformed the wheel test you show, they turn opposite of each other. so is there a chance it is limited slip but worn out?? Hearing a lot of clanking in the rear end, perhaps thats why
Is there a way to check for play and see if the clutch packs are getting worn out when the diff cover is off? How many miles will they typically last- when properly maintained. Another great video btw. 👍🏼
My 2012 F150 has Axle code 27 indicating open diff (with original diff), but when jacked up each wheel spins independently and doesn't have electronic limited slip.
Thanks for the great info I have used some of your videos that have helped my fix my fords. Thanks for all your videos will have to do my timing chain on my EcoBoost soon will be using your videos to help with the installation
Thanks for another great video. I replaced the differential fluid in the F350 super duty and now I need to replace the rear axle dust shields and park brake. I see people are packing the floating rear wheel bearings and say the manual recommends this. What Motorcraft grease is compatible with the Motorcraft Synthetic 75-140 Rear axle lubrication? Should I just use the leftover axle lubrication on the bearings during reassembly and forego the grease?
Thankyou.. I had mine serviced they found 3 chipped teeth and they the shop wanted to replace the whole rear end. I've think that maybe I'll just wait and see. The truck has 220k on it but has been babied since new
First, great channel! I own 3 Fords in Rockford, IL. This channel keeps them running! I have a newly acquired 03 F150 5.4 2V with a rear diff that has an overlabel on the rear axle and steel tabs on the diff cover that calls out FEHP oil only 75W90. I think this may be rebuilt rear diff? Original calls for 75W140. Also noticed an actual gasket material is used, versus gasket maker. Can you give me some advice on this scenario? Jeremy
Nice Video, Someone might become confused, when looking at their differential and seeing an electrical connector. They might assume that they have an electric locking differential, when in fact they are looking at the connector for the ABS brake sensor. Assuming they do the easiest way to drain oil by putting truck on ramps and dropping the cover. they would never know.
I have a 2017 F350 DRW with the (3k) axle. how much friction modifier is required? I can't find any info on this. Thanks for the videos. They save me tons of money!
my 2005 has that same electrical connector on the rear end , does that mean it is electronically locking differential and no need for friction modifier?
@@FordTechMakuloco Great video! Seems if you use the motorcraft 75w-140 you have to add the limited slip additive. With the valvoline it appears it’s already in which is nice because it takes the guess work out of weather you need it. Of course you could add to motorcraft to be on safe side.
Oh, yes most aftermarket fluids have it already installed to prevent warranty claims. Problem is most times the additive is not the right amount or maybe a batch went out without it or the friction modifier they use is not compatible with the Ford friction material. More times than not this causes a chatter issue when hot on tight turns. For this reason, I only use virgin Motorcraft fluid and add the additive myself.
I found another trans fluid that meets factory specifications for the 2018 with electronic lock. It’s Redline 75W85. It’s $10 less than Motorcraft per quart.
My 2019 expedition 4x4 rear end looks nothing like that. It has a drain and refill plug. And the cover is in very tight quarters. I was at ford and asked about the 75w-85w oil for the rear end and its like $38 a quart. Can I use 75w-90w instead? Much cheaper and available. I also have the 3.73 ELSD Axle. My wheels turn opposite so no need for the modifier. Dealer said I needed it. I'll take it back. Great Video
That's cuz the expedition has independent rear suspension, it does have a differential in the center would have shelves coming out each side going to the wheels
On your first example, because it was in neutral with the ELD, is it possible the other tire didn't spin in reverse due to the neutral? If you had put that in park/gear so it was locked wouldn't the other tire rotate in the opposite direction?
So just to get this straight if you put lockers in a limited slip then it will always be diff lock right? Like on pavement when you turn your inside wheel will do a burnout.
Hi I appreciate your videos very helpful thanks, I have an open differential 3.31 gears. What parts do I need to buy and replace to have a 3.73 Limited Slip ?
Glad I watched this before popping off my diff cover. Added friction Modifier to cart. Any issue with using Valvoline 85-140? Should have watched your other videos before purchasing gear oil...
Hello, thanks for your videos! one question, i have a 15 f150 5.0 with a conventional rear differential, can i install an electronic rear differential taken from another f150 same year but EcoBoost?
question - i have a 96 bronco w/ a 3.55 differential (H9 axle Code) . the axle has been replaced w/ a (i believe) a 3.55 off a 1988 f150. steel pin in the middle fell out (do not know how) and bent and came thru the cover.. may have been i put on a custom diff cover that had bolt that were torqued to the gears.. my guess i didnt have them torqued enough.. painful lesson learned.. I jacked up my truck and it appears my wheels do spin in opposite directions.. so this would be an "open diff" does not need additive.. although I will be adding to it.. I also noticed there was some play before the tires would engage ( in neutral) hope this is just normal.. would hate to go thru another rear axle.. thanks ray any help would be great.
I see where I can get a limited slip differential put in my truck, I have open differential. Any videos on how to do this? Is it very complicated or require specialized tools? I can't see it being that bad but maybe it is?
i have a 2007 ford explorer sport trac 4.0 ltr. i need help on how to remove the cover on the rear differential , so i can change out the fluid and gasket. I can not seem to find any videos on my year sport trac to reference.
As Always, GREAT content 👍🏼 I’ve got a Ford E-series. At Slow, parking lot speeds, WHEN TURNING, I hear a rhythmic (noise) from the rear, like a hydraulic Jack screw, if you’re familiar with that sound. Is this a ‘normal’ characteristic (LSD) ? It doesn’t necessarily sound like something’s ‘wrong’, I just like to know what noises are in my vehicle’s ..,. Thank You !
@@FordTechMakuloco thank you. I don’t know enough to make an informed diagnosis, and not any shops in area gave me confidence (in them) to diagnose LSD, so I’ll start with oil change. 🤷🏻♂️
Why do I have the electronic wiring as on the first example but when I jacked up the rear end 1 tire went forward the other backwards??? I guess I don’t need to add friction modifier...
Yes, without the FM the truck will let ya know it's not been added. Taking off from stop sign turning left or right will cause the rear wheel to skip and jump harshly. I had the bottle but dude forgot to add it!! If ya want something done right ya do it yourself!!!
Already I got a question for you I want to put a locker in the front on my F150 with 2010 I have an LS in the rear what locks are you scared for the front
Hey Brian, is pulling the axle to replace the rear (axle) bearings the same on both diff types? I suspect you have to be extra careful not to push out a spider gear with the locking diff.
It is the same both ways you just need to be more careful with the non locking conventional diffs whereas a locking diff spider gears will stay in place.
I have an open diff in my 04 explorer. It seems mostly all gear oil now has a friction modifier in it. will it be harmful if I use a gear oil that has a friction modifier added???
What type of oil is used in these Ford E locker rear axles? I have some royal purple that i’ve never opened, but it’s from 2010 lol never opened. It was for a fox body 5.0 manual transmission. I don’t remember what it is off hand. I’m out on the road for work.
I went to the dealer they told me I need the FRICTION modifier but when my truck was off the ground I notice I manually spin the tire, they go the oposité way, so mine it’s an OPEN differential, but I spin the the tires while on park, I mean not really spin but the play the tires ll have. Do I need to have in neutral.?
So I just bought 98 Mercury Grand Marquis it's got 79,000 mi on it I changed all the other fluids tranny engine coolant I'm wondering if I should change the rear differential fluid being that is 26 years old? I mean there's no problems or anything and I heard that it's okay to use for the life or the vehicle but it's already been 26 years lol and I plan on driving it until I hit 300 400,000 mi lol
What if you get a vehicle that has all the information missing or gone? Such as it was painted and no sticker on the door and no tag on the diff? My question is can you add a friction modifier to a diff that doesn’t require if? Would it do any damage?
Is an open differential the same as a limited slip and do both not require a friction modifier. I have a 2005 f150 with a little whining going on weather I'm on street or dirt roads..I've also put on brand new tires and the noise was there before the tire change.
Will valvoline full synthetic limited slip work in ford rear ends bc I'm noticing my expedition is acting different in the rear since I changed mine a few weaks ago.
They include the limited slip additive in the fluid already, problem is it is not enough or is the wrong kind so I always stay away from axle fluids premixed with the LSD additive. I add it on my own with virgin axle fluid from Motorcraft.
If you have LSD do you have to add a separate thing of friction modification fluid even if the one gallon jug has limited slip additives in it already?
I can’t message through YT anymore so I figured I’d ask here...... I have a 2014 F150. When I am coming to a stop I feel a shudder which I thought was the tires at first but new tires did not alleviate the problem. When I put it in neutral while coming to a stop the shudder disappears which alerts me that it is definitely in the drivetrain somewhere. It also does this while going down the road at low speeds (under 15mph). I’ve checked universals, wheel bearings, CV shafts and nothing turns up bad. The truck only has 48,000 miles on it but has been doing this for about 10,000 miles. I’ve taken it to the dealership and they are chalking it up to the lift which I know isn’t the case especially since the problem goes away when the pressure is off the drivetrain. I’ve searched UA-cam and forums and there are a few cases of the same thing but no reported fix. I’ve checked the pinion angle which is off approximately 3 degrees which the lift manufacturer says is normal. I am eagerly trying to locate the problem and move on but I can’t figure it out. Can you please tell me if you’ve seen this before and what your thoughts are on the cause of the issue. I am thinking driveshaft but do not know how to prove or distinguish it without buying a new one.
Have you pulled rear driveshaft from truck and applied new grease to the splines of the slip yoke that goes into transmission? That sounds like the classic binding noise/thunk due to no grease allowing it to slide easier. Removing load ( neutral) masks it.
I have a 2006 F150 4.6 L it has the 3.55 differential I’m wanting to put a 4.10 differential I have aftermarket 20 inch rims. Is there anything additional I should do i.e. should I tune for this reset the PCM etc.
In the end remember this: You can add friction modifier to any axle and no harm will be done but if you don't add friction modifier and the differential ends up being a limited slip unit, damage will occur. So if you are still unsure if your axle requires friction modifier after this video it is better to be safe than sorry and just add one entire bottle with your new axle fluid. Ford Friction Modifier (most axles only require one bottle)-
amzn.to/2EajfDD
Have you seen the damage done first hand? Thank you great video!
Yes
@@FordTechMakuloco what took the brunt of damage, the friction discs? Tens of thousands of miles maybe 100,000. I was fascinated with this additive in our posi rear ends. Thank you
@@FordTechMakuloco hello my friend, how do I know what type of oil does my f150 use on the differential??? Is there a way to know, or if you can tell me it will be great.. thank you.
I used royal purple on my diff and didn't realize it needed friction modifier I got about 200km before needing a new diff
You have some of the best videos on UA-cam. Straight to the point without unnecessary drama or music. Nicely done.
Damn good information! He's on here helping America!
One of the best changes I made to my 2010 was swapping the factory limited slip with an Eaton trutrac. Works awesome!
What gear oil did you use?
@@noontimewhale I use a shell mineral oil. It specifically calls for mineral based gear oil only. No synthetic allowed or it won’t function properly.
@@kevinoneill41 My truck is RWD only. I have never gotten stuck with it, but don’t go doing any true off-road either. But I do live in Canada with bad winters and with the rear Trutrac and snow tires; I have no issues in driving through unplowed roads that stop other vehicles. I found it to be a very worthwhile upgrade. I have tested it where one wheel is on ice and the other on clear road and the truck accelerates as though both wheels were on dry pavement. I can tell when it may be time to change the diff fluid because I will start to feel a bit of a binding when doing sharp turns.
Only negative I would say for it is the fact you can’t run synthetic diff oil and in the cold I can feel how much thicker the oil is before it warms up. And in general, I would say the truck took a small hit in fuel economy because of that.
"...This right here is what they call a conventional differential or OPEN differential and is NOT because the cover's off..."
. . . that made me chuckle, LOL. 🤣
Good work, Mr Brian ! 👍😎
I recently got myself a new-to-me 2011 F150 XLT EB, and I have found your videos to be the most informative of them all. I'm not an automotive nerd by any stretch of the imagination, but I am a big time DIYer and your videos are so very helpful!
Nice vid thanks. Basically in a nutshell if both wheels turn the same way you need friction modifier added in when changing the rear differential fluid
Perfecto. Simple and easy to understand. I have a 2015 EcoBoost and I find your videos helpful from time to time! Preventive maintenance! The only problem I’ve had with my truck in its 135k is the darn Lariat dual climate actuators and the expansion valve for the A/C in the firewall has gone out twice.
Great video, used the fluid change vid to change the fluid in my 14 F350 SD and now my 05 F150. Each have a (what I call ) a timing wheel on the left side. The 14 looks to be the electronic lock Dif. I bought the 150 with a 3.55 limited slip. Nice to know that there is no harm done by adding friction modifier!
Love this channel and don't own a Ford or truck.
Same here. I wish there was a GM version of this guy.
Buy a ford 🤷♂️
Changed my differential oil on my 2010 F150 and got further confused about the friction modifier because I thought I had the locking diff, but it was a locking Transfer Case that connects the front dif to the rear dif. Never had so much overthinking involved in an oil change before! Mine was the FX4 which was advertised as a limited slip so I went with the friction modifier. Like he says, the modifier won't hurt if it doesn't need it, but if you're trying to debate ordering some for your change Ford advertises the heck out of the locking rear differential but makes almost no mention of the Transfer Case lock, and they look the same on the 4H 4L switch. I referenced the video you made about the differential change and you showed it as an electronic locking but the electric switch looked different than in this video with the newer model.
Thanks for all your video's hoping my F150 will last years and years. 2010 FX4 5.4L Super Crew
Thanks for that. I never “actually” knew what the modifier was doing when added. And now I also know to just it regardless. 👍🏼🇨🇦
So thankful for your channel. Thank you for taking time out of your day to educate us on these procedures. You've saved me so much time and money.
Great information as always....thanks! BTW, I loved that unintentional pun-"They call this an open differential but not because the cover is off"!
Lol
Your knowledge and experience is much appreciated, thank you.
Finally I know what I have for rear diff thanks for another well explained instructional.
Beautiful video and hello from Puerto Rico 🇵🇷
Nice!! Never knew an electronic diff would only spin one wheel. Cool!
Only until you lock it in
Great information, as always. I already knew about trac-loc and open diffs, but not about electronic locking diffs.
Great job, Brian! Showing how to quickly tell the difference between the diff. diffs!! So to speak!! Lol
I’m getting a new F-350 SRW by the end of this year. I live in N Ohio. I pull relatively light trailers 10,000-16,000 lbs. I’m on ice and snow a few weeks of the year but mostly damp/wet roads. I’m a developer builder and am off road almost every day but the worse case scenario is a job site with no gravel set where the future road will be.
I’ve had lockers for a long time and have an older 07 F-150 KR 4x4 with a limited slip. I had that rear end serviced (oil changed) and they forgot to put in the friction modifier….. now the rear end whines a little all the time.
The manual is great reference, but ford might have made changes for the type oil that goes in the rear diff, if you go to the dealership, using the vin # , they would tell you the latest and greatest fluid type, with the rear diff there has been some changes in type of fluid. Great Content
Thanks for the info! So what's better - electronic locking or a limited slip dif? On a side note - I'm guilty too, but manual says never to jack up the car by the rear dif :)
Thank you so much, I was going crazy trying to figure this out, 01 f150 super crew - rear V941A 3L55 975. Your insight and knowledge help me determine min is a limited slip and I need that additive.
Great information, I’m looking at changing the oil, and was thinking how to identify my 4x4 rear axle.
My manual empized never raise the rear axle with a floor jack under differential. The cover could become distorted or cracked. I did it because I saw several videos showed it and it is now leaking fluids by the buckets. I was very careful, but I now have to buy a new cover and hope that will cure the problem.
You raise it by the pumpkin which is part of the axle housing never by the cover. Do it this way and you will never have a problem.
......so,... I changed my gear lube a couple months ago, and recently it started grabbing when accelerating from a turn. I THOUGHT it was an open diff, but the wheels turn the same direction when suspended, so.... I ordered the friction modifier just now. Will I see any long term damage from driving this way?? I honestly did not think it was a limited slip.
Man, what a timely video.....!!
Dump that XL-3 in there immediately and hopefully with any luck it will take.
@@FordTechMakuloco Yes, I put the magic juice in a couple weeks ago- it seems to be MUCH quieter now. Thanks SO MUCH for all your great videos- I have learned a TON!!
Man I needed this video. Learned me a few things. Thanks
Hi Brian ...I've have learned so much from you I feel I should send you a check...lol..they
don't teach some the things you've shown us the way you do ... I Enjoy your videos... Cheers 🍻🍻🍻🇺🇸🇺🇸
Absolutely great explanation.. thanks for passing the knowledge on...
I always check As each has a different weight rear axle fluid as well. Some take 75W-90 others take 75W-140 Plus the Modifier...
Master chief, would you say that those taking 75W90 are possibly rebuilt? Seeing that original 03 F150 5.4l 2V calls out 75W140? Jeremy. (I just acquired this truck and rear axle has overlabel and tabs on diff case cover that call out 75W90 only)
Phew...I added limited slip modifier to an open diff. Rookie mistake but thanks for the clarification.
Also, H-9 will be on door tag. Limited Slip.
My wifes rear is limited slip.
Ozzstar my wife just blew out her rear seal
@@Cfass1 lol
HAHAHA! Ozzz!😂😂
I hope you use friction modifier
@@acts2211 > best to listen to what da man said.....when back there, it's better to be safe and use a friction modifier on any model of rear, to prevent catastrophic damage....lol.
Another great informative video. Thanks for taking the time to show how to get things done right.
Good videos as always. A point of experience. A limited slip differential will oftsn spin the opposite direction of the tire you are turning. It's better to leave one wheel on the ground and you notice you can't spin the wheel that off the ground.
A limited slip is locked together so they spin together, you are thinking of an open diff. This video is to show you what diff you have not if your limited slip diff is worn out which is the test you are speaking of.
@@FordTechMakuloco Now i'm confused. I changed my diff fluid in my 2010 F150 and the Axel code is H9, which is LS, However when I preformed the wheel test you show, they turn opposite of each other. so is there a chance it is limited slip but worn out?? Hearing a lot of clanking in the rear end, perhaps thats why
Cool. If you have an open diff can i upgrade to a locking diff?
yes
Is there a way to check for play and see if the clutch packs are getting worn out when the diff cover is off? How many miles will they typically last- when properly maintained. Another great video btw. 👍🏼
My 2012 F150 has Axle code 27 indicating open diff (with original diff), but when jacked up each wheel spins independently and doesn't have electronic limited slip.
yes they will do that when open.
Thanks for the great info I have used some of your videos that have helped my fix my fords. Thanks for all your videos will have to do my timing chain on my EcoBoost soon will be using your videos to help with the installation
Thanks for another great video. I replaced the differential fluid in the F350 super duty and now I need to replace the rear axle dust shields and park brake. I see people are packing the floating rear wheel bearings and say the manual recommends this. What Motorcraft grease is compatible with the Motorcraft Synthetic 75-140 Rear axle lubrication? Should I just use the leftover axle lubrication on the bearings during reassembly and forego the grease?
Thankyou.. I had mine serviced they found 3 chipped teeth and they the shop wanted to replace the whole rear end. I've think that maybe I'll just wait and see. The truck has 220k on it but has been babied since new
Great video, i like it when people show a video of the differentials working. That's all i wanted. ^^
First, great channel! I own 3 Fords in Rockford, IL. This channel keeps them running! I have a newly acquired 03 F150 5.4 2V with a rear diff that has an overlabel on the rear axle and steel tabs on the diff cover that calls out FEHP oil only 75W90. I think this may be rebuilt rear diff? Original calls for 75W140. Also noticed an actual gasket material is used, versus gasket maker. Can you give me some advice on this scenario? Jeremy
What if you put the additive into a conventional diff if you are not sure? Is that safe?
yes
Great demonstration! Your channel is very informative.
Thank you for sharing!
On the open diff how does the vehicle move forward if one wheel is spinning backward?
They spin forward when the pinions is the driving member.
What is the gear on the side of the ring gear for?
now on the electric locker
when engaged
is fully locked like a spool
or it just on / off limited slip diff
its locked
Thank you for this video! I found out I have a limited slip in my truck!
Just what I was looking for. Thank you so much.
I have a 2010 with an open dif. Can I swap it with an LSD without any problems with the traction control?
Nice Video, Someone might become confused, when looking at their differential and seeing an electrical connector. They might assume that they have an electric locking differential, when in fact they are looking at the connector for the ABS brake sensor. Assuming they do the easiest way to drain oil by putting truck on ramps and dropping the cover. they would never know.
The abs sensor is never on the side of the diff case. The e-locker connector is on the side of the diff case as He explains it in the video.
2001 F250 Heavy Duty
Oline theres different responses..
What type of oil for the rear and type of oil for the fwd ?? 🎉🧨🧨🧨🧨🧨
I have a 2017 F350 DRW with the (3k) axle. how much friction modifier is required? I can't find any info on this.
Thanks for the videos. They save me tons of money!
The electronic connector at 2:35 What is that part name?
I've got an eddie bauer 2000 ford expedition with the sensor on it to activate the A4WD magnetic clutch...
my 2005 has that same electrical connector on the rear end , does that mean it is electronically locking differential and no need for friction modifier?
No, on your vehicle it is an ABS sensor and its on top of the diff not the side.
What if I have an electronic locking differential and both tires spin; what would that mean?
What about the front axle does that need a friction modifier?
Normally never until recently on some of the newest Ford models with the Torsen differential they require 4oz yes
Will it matter if I put 75 x 1 40 and this contains limited slip additive in the rear end thank you let me know please
Valvoline synthetic 75w-140 has the limited slip additive in it already.
Yes and?
@@FordTechMakuloco Great video! Seems if you use the motorcraft 75w-140 you have to add the limited slip additive. With the valvoline it appears it’s already in which is nice because it takes the guess work out of weather you need it. Of course you could add to motorcraft to be on safe side.
Oh, yes most aftermarket fluids have it already installed to prevent warranty claims. Problem is most times the additive is not the right amount or maybe a batch went out without it or the friction modifier they use is not compatible with the Ford friction material. More times than not this causes a chatter issue when hot on tight turns. For this reason, I only use virgin Motorcraft fluid and add the additive myself.
Thank you for the info! Also really appreciate your videos and advice! I have use them for years maintaining my 2009 F150.
I found another trans fluid that meets factory specifications for the 2018 with electronic lock. It’s Redline 75W85. It’s $10 less than Motorcraft per quart.
Super!! Learned something new today,checking my differential tomorrow.👌👍🏻
My 2019 expedition 4x4 rear end looks nothing like that. It has a drain and refill plug. And the cover is in very tight quarters. I was at ford and asked about the 75w-85w oil for the rear end and its like $38 a quart. Can I use 75w-90w instead? Much cheaper and available. I also have the 3.73 ELSD Axle. My wheels turn opposite so no need for the modifier. Dealer said I needed it. I'll take it back. Great Video
That's cuz the expedition has independent rear suspension, it does have a differential in the center would have shelves coming out each side going to the wheels
On your first example, because it was in neutral with the ELD, is it possible the other tire didn't spin in reverse due to the neutral? If you had put that in park/gear so it was locked wouldn't the other tire rotate in the opposite direction?
So just to get this straight if you put lockers in a limited slip then it will always be diff lock right? Like on pavement when you turn your inside wheel will do a burnout.
I have no idea what brand or type of "lockers" you are installing so consult the manufacturer of the product you are going to install.
@@FordTechMakuloco I wasn’t planning on installing any I was just curious if that’s what lockers did. Like pretty much a welded diff
I have a 2004 ford f-150 with the 4.6 one wheel peal and want to put a posi rear gear in it but I need to know the rear end size.
My 2002 SD 7.3 has an electrical connector going into the rear diff. Now I know why. Thanks
No yours is an ABS sensor.
@@FordTechMakuloco ok, thanks
Hi I appreciate your videos very helpful thanks, I have an open differential 3.31 gears. What parts do I need to buy and replace to have a 3.73 Limited Slip ?
do they make open diffrentials for the 2004-2005 ford explorer chomp style diffrentials
Glad I watched this before popping off my diff cover. Added friction Modifier to cart. Any issue with using Valvoline 85-140? Should have watched your other videos before purchasing gear oil...
Thanks man very nice video keep up the good work
Great Video Brian. 👍🏻 as always
Could you do a video on replacing coolant on the 6.7 diesel engine for both the engine as well as the fuel sides.
You videos are outstanding
Hello, thanks for your videos! one question, i have a 15 f150 5.0 with a conventional rear differential, can i install an electronic rear differential taken from another f150 same year but EcoBoost?
question - i have a 96 bronco w/ a 3.55 differential (H9 axle Code) . the axle has been replaced w/ a (i believe) a 3.55 off a 1988 f150. steel pin in the middle fell out (do not know how) and bent and came thru the cover.. may have been i put on a custom diff cover that had bolt that were torqued to the gears.. my guess i didnt have them torqued enough.. painful lesson learned.. I jacked up my truck and it appears my wheels do spin in opposite directions.. so this would be an "open diff" does not need additive.. although I will be adding to it.. I also noticed there was some play before the tires would engage ( in neutral) hope this is just normal.. would hate to go thru another rear axle.. thanks ray any help would be great.
I see where I can get a limited slip differential put in my truck, I have open differential. Any videos on how to do this? Is it very complicated or require specialized tools? I can't see it being that bad but maybe it is?
i have a 2007 ford explorer sport trac 4.0 ltr. i need help on how to remove the cover on the rear differential , so i can change out the fluid and gasket. I can not seem to find any videos on my year sport trac to reference.
Valvoline full synthetic oil state “limited slip” ... means no friction modifier is required?
As Always, GREAT content 👍🏼
I’ve got a Ford E-series. At Slow, parking lot speeds, WHEN TURNING, I hear a rhythmic (noise) from the rear, like a hydraulic Jack screw, if you’re familiar with that sound. Is this a ‘normal’ characteristic (LSD) ?
It doesn’t necessarily sound like something’s ‘wrong’, I just like to know what noises are in my vehicle’s ..,.
Thank You !
No not normal, the most common noise is clutch chatter at low speed tight turns due to failed clutch packs.
@@FordTechMakuloco thank you. I don’t know enough to make an informed diagnosis, and not any shops in area gave me confidence (in them) to diagnose LSD, so I’ll start with oil change. 🤷🏻♂️
Why do I have the electronic wiring as on the first example but when I jacked up the rear end 1 tire went forward the other backwards??? I guess I don’t need to add friction modifier...
Yes, without the FM the truck will let ya know it's not been added. Taking off from stop sign turning left or right will cause the rear wheel to skip and jump harshly. I had the bottle but dude forgot to add it!! If ya want something done right ya do it yourself!!!
Already I got a question for you I want to put a locker in the front on my F150 with 2010 I have an LS in the rear what locks are you scared for the front
Hey Brian, is pulling the axle to replace the rear (axle) bearings the same on both diff types? I suspect you have to be extra careful not to push out a spider gear with the locking diff.
It is the same both ways you just need to be more careful with the non locking conventional diffs whereas a locking diff spider gears will stay in place.
I have an open diff in my 04 explorer. It seems mostly all gear oil now has a friction modifier in it. will it be harmful if I use a gear oil that has a friction modifier added???
Not harmful at all.
What type of oil is used in these Ford E locker rear axles? I have some royal purple that i’ve never opened, but it’s from 2010 lol never opened. It was for a fox body 5.0 manual transmission. I don’t remember what it is off hand. I’m out on the road for work.
I went to the dealer they told me I need the FRICTION modifier but when my truck was off the ground I notice I manually spin the tire, they go the oposité way, so mine it’s an OPEN differential, but I spin the the tires while on park, I mean not really spin but the play the tires ll have. Do I need to have in neutral.?
Really informative without using the doctor wording.
So I just bought 98 Mercury Grand Marquis it's got 79,000 mi on it I changed all the other fluids tranny engine coolant I'm wondering if I should change the rear differential fluid being that is 26 years old? I mean there's no problems or anything and I heard that it's okay to use for the life or the vehicle but it's already been 26 years lol and I plan on driving it until I hit 300 400,000 mi lol
My rear end clutches are giving out looks like fun to change
What if you get a vehicle that has all the information missing or gone? Such as it was painted and no sticker on the door and no tag on the diff?
My question is can you add a friction modifier to a diff that doesn’t require if? Would it do any damage?
Yes you can just to be safe.
Is an open differential the same as a limited slip and do both not require a friction modifier. I have a 2005 f150 with a little whining going on weather I'm on street or dirt roads..I've also put on brand new tires and the noise was there before the tire change.
Will valvoline full synthetic limited slip work in ford rear ends bc I'm noticing my expedition is acting different in the rear since I changed mine a few weaks ago.
They include the limited slip additive in the fluid already, problem is it is not enough or is the wrong kind so I always stay away from axle fluids premixed with the LSD additive. I add it on my own with virgin axle fluid from Motorcraft.
What kind of rear end does the expedition have?
Its of course a limited slip but what I found out its requires gl-5 requirements
If you have LSD do you have to add a separate thing of friction modification fluid even if the one gallon jug has limited slip additives in it already?
Did you ever get an answer to this?
My manual says to use 75/90 in front and rear differential. But I have heard different from other people is 75/90 synthetic correct in both?
As always ,great video.
Very educational.
Thank You
I can’t message through YT anymore so I figured I’d ask here...... I have a 2014 F150. When I am coming to a stop I feel a shudder which I thought was the tires at first but new tires did not alleviate the problem. When I put it in neutral while coming to a stop the shudder disappears which alerts me that it is definitely in the drivetrain somewhere. It also does this while going down the road at low speeds (under 15mph). I’ve checked universals, wheel bearings, CV shafts and nothing turns up bad. The truck only has 48,000 miles on it but has been doing this for about 10,000 miles. I’ve taken it to the dealership and they are chalking it up to the lift which I know isn’t the case especially since the problem goes away when the pressure is off the drivetrain. I’ve searched UA-cam and forums and there are a few cases of the same thing but no reported fix. I’ve checked the pinion angle which is off approximately 3 degrees which the lift manufacturer says is normal. I am eagerly trying to locate the problem and move on but I can’t figure it out. Can you please tell me if you’ve seen this before and what your thoughts are on the cause of the issue. I am thinking driveshaft but do not know how to prove or distinguish it without buying a new one.
Have you pulled rear driveshaft from truck and applied new grease to the splines of the slip yoke that goes into transmission? That sounds like the classic binding noise/thunk due to no grease allowing it to slide easier. Removing load ( neutral) masks it.
you are just the best men ! thank you so much for that info !!!
Brian great explanation very informative nice video
I have a 2006 F150 4.6 L it has the 3.55 differential I’m wanting to put a 4.10 differential I have aftermarket 20 inch rims. Is there anything additional I should do i.e. should I tune for this reset the PCM etc.