Freightliner Cascadia DT12 automatic transmission issues clutch not working truck does not move
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- Опубліковано 29 кві 2022
- WARNING!!: ⚠️⚠️⚠️
Always use the proper tools and safety equipment to perform this job.
Failure to perform the job correctly can result in personal injury or vehicle damage.
Don't do this job if you think you don't have the experience or the equipment to do this job correctly. REMEMBER SAFETY FIRST!
Warning!!! ⚠️⚠️⚠️
This video is just a demonstration of the labor to do to perform this job, the results may vary.
Also, the damage found can be greater that expected and it can result in a massive engine failure.
This video contains advance technician information.
keyworks
freightliner kenworth peterbilt international volvo mack western star cascadia coronado t660 t680 t700 579 389 379 589 vnl vn
cummins isx cummins isx15 cummins n14 cummins m11 cummins isb cummins isb DD15 DD13 DD16 Series 60 caterpillar C15 3406 C13 OM 460 OM471 OM472 OM473 mercedes benz atros DD13 DD15 DD16 60 series class 8 truck tractor
Topics discussed :
what types of problems dt12 transmission have
why is hard to work on automatic transmissions
how a dt12 transmission looks
how to repair a dt12 transmission
symptoms of the fault are:
transmission not going in gear
truck does move
transmission warning on
check engine light on
Tools need:
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Parts needed
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Take actuator out, press on it and put finger where the air travels, if it expands, the change it. Also change the split pin bushing
You are a good mechanic, I salute you
Yo tuve unos problemas con mi transmisión DT12 de clutch y aparte de eso se salía de ciertos cambios porque no entraban bien en el engrane. Yo solo figuré todos esos problemas todo por el resultado de una sola cosa que perjudicaba con el agarre del clutch cuando solamente seleccionaba de D (drive) a R (reversa). El clutch está nuevo y aún así algunos mecánicos me decía que era el clutch pero no fue así. Aquí explico lo siguiente de lo que pasó de un trabajo anterior que le hicieron a mi camión con el dueño anterior que nunca me mencionó. La causa de todos mis problemas de transmisión fue por el sensor de presión de aceite del motor que fue “aftermarket”. Debido a ese sensor, la presión leía menos libras de presión de lo que debería de un sensor OEM (original) y en vez de solucionar el problema con remplazar el sensor con uno original, le aumentaron el Idle RPM de 600 a como 720 así para crear más presión de aceite y así para que el camión no joda con que tiene baja presión de aceite. Ese incremento de RPM’s perjudicó con el calibre de la computadora del DT12 y por esa razón mi clutch no agarraba bien cuando selecciono D o R. Compré yo mismo el sensor original y se lo remplacé y ahora me lee más libras de presión con el original y luego fui a que me le redujeran los RPM’s de regreso a 600 como debe ser. Mi punto es que si el motor tiene un idle más arriba de 600 RPM’s por cualquier razón con transmisión DT12, eso te va dar muchos problemas con el agarre de clutch y también para que entren bien los cambios.
Buenísimos tus videos amigo
Hace unos dias conecte transmitían control module y cuando estaban haciendo la programacion le sale esto Al mecanico GEAR RAIL SPLIT SENSOR GEAR POSITION ERRATIC que crees que me aconsejas pq según dicen ese sensor esta dentro del shift controler o algo asi
Francisco, what's the life expectancy of an AT12? I had my clutch, actuator and clutch brake replaced January 2023. Around May or June it started displaying characteristics of the Split Shift Rod issue, dropping to Neutral and hesitating when upshifting from 9 and would typically drop into 11 at around 1100RPM when clearly it should be in 10th. Then around September it started also exhibiting the DDC-SVC-MAN-0140-15.1 Engine RPM Flare during upshifts. I contacted the dealer inquiring as to why they didn't check the Split Shift Rod when they had it in January, convinced they'd overlooked it. But they showed me a Daimler record of my truck receiving the titanium collar in 2017. They added that they'd never seen one fail. I took it in to have a road test and computer disgnosis and they said they took the screen out and they found metal filings. At 879,000 miles, they're advising that the transmission needs replacing. Although I'm suspicious of the metal filings being the clutch brake or the split shift rod, I'm more inclined to just replace it than throw good money after bad. Any thoughts?
Would it be possible to remove the d t twelve shift controller without dropping the transmission
Una pregunta se puede transformar la transmisión mérito de bobinas electrónicas en solo aire
THANK YOU Francisco. The way you held the sensor and rotated the screw In mechanism gave me the idea how to remove it.
I just got done replacing the clutch in one of these at my shop and per instructions am replacing the actuator on the transmission as well. But when I compress thee actuator and bolt it up in the compressed position it keeps slowly creeping outward until fully uncompressed. I got a brand new o ring on it so it's not that. And if I compress the actuator and hold my finger over the hole it will stay compressed all day long. My question is what inside the transmission could be causing it to lose vaccum? Any help would be awesome thanks. Love the video.
Mego , you have any video for conter shaft plates ? Delae give me a package which hold lot of plate .. different type of sets .
Can you please teach us how to bye pass volvo and dd15 trucks transmission neutral switch .in the event of emergency when truck not start due to neutral not detected ? Please help us bro if you can
I keep getting spn 521486 fmi 5 on mine sometimes it randomly throws me into neural on the highway
FRANCISCO WHERE WIULD THE FILL PLUB BE IN A DT12 TRANSMISSION THANK YOU
Pls let us know the fix. Mines having problems Accelerating at 35 miles
Hola tengo una transmisión automática DT 12 en un cascadas y quiero adaptar sistema de pto es posible hacerlo me gustaría saber si opinión gracias
Most of this transmission problem with small air breather ;; or you need to drill the down opining with 2 screws so you relieve the vacum from the clutch room
i have an emergency question if you can help please … I have 2016 Cascadia with dt12 automatic transmission and my shift controller on the transmission is damaged … does that make my truck not to start at all ????????????????????? the guy who checked my truck with the computer said so but I kind of have a doubt as it doesn't make sense unless if you confirm i also changed the cpc4 and reprogram it to my vin and still doesn't start the truck and that's the only error it's showing just to mention ... the cpc was changed as it was stolen from my truck and i bought 2 used ones ... one is not programmed and it does crank my truck but won't throttle or put gear on .. and the second one is the programmed to my vin and doesn't crank the truck at all
I have a problem cascadia DD15 no shifting transmission, it looks like the same problem as you showed on the video, I wondered if you solved the issue and shared it if possible please. Thanks
Good morning brother quick question I noticed my dt12 transmission is making noise while dowm shifting but not every gear any suggestions, and it only has 197,000 on it
so my question is on the automatic how long do they last how long will the clutch go out in it
Good evening Francisco, got an issue with a 2016 DT-12 tranny, automatic. The 7th gear on the tranny grinds when driving. I replaced the clutch, actuator, module, and cpc plus the ecm on this truck and still can't take the grinding away. Any thoughts on what it can be. O I forgot that when I try to learn the gears with my computer, it doesn't allow it to finish the learning process.
Hi man where are you located
Because I start some problem on my truck
Can you help me with it?
Thanks
Would anyone know what normal operating temperature would be on DT12 transmission 2021 freightliner
Hey where are you located? Do you work on any customers cascadias?
Hi sr pregunto cuantos galones de acite transmission y diferenciales para international 1994 gracias
Hello Francisco
I have DT12 transmission automatic
While downshifting it’s going in neutral it’s pulling and running fine I have to do complete stop to put in drive again my mechanic changed split pin , clutch and actuator
Still same issue please advice
Where in Fontana or what shop are you in?
How do you remove the pressure sensor?
What does it mean if I have the same transmission and it slips in 12th gear when I get on the gas but every other gear is fine
Hi sir i got this codes spn 521485 fmi 2 what should i do my machninc really dont know what to do on this situation please help me out
What are those two round plastic cups at the bottom @3:07
Amigo mi camion me sale q el cluth esta caliente me sale ese msj dise creep mode desabled cyal sera el problema mi transmision es dt12 automatica
Buenos días Francisco!!! Edgar Telon te saluda tengo un problema con una transmisión DT12 cómo puedo contactarte??
The transmission control module , Some guy called it T Bar. Base it’s shape.
mine has 2016 modal frightliner just problem in morning to moive D if itry R moive riteway but u think problem buddy
Great video! Definitely informative. I did have question in regards to the dt12 not sending any active codes. But instead just setting off both abs and hsa lights. Also showing - - in the gear selection screen. Any input would be greatly appreciated
Did you find out what it was?
Did you get any answers?
I’ve had same problem. 2016 Cascadia. Trans acts like it’s not getting enough air and then starts not wanting to shift properly. Then HSA light comes on and trans goes to neutral and I have no throttle. ABS light on also even though everything has been replaced related to ABS. Very strange. Any ideas anyone?
Hey where is your shop and phone number to your shop in Texas, I need a cam seal replacement and valve adjustment this weekend, how much would that bee??
Saludos Francisco tu eres hispano porque no haces los videos en español necesitamos videos en español te lo vamos agradecer
What does it mean when you compress the clutch actuator before installation but it bleeds off by itself back to decompress position, bad clutch actuator?? Thanks love ur vids
yes, it can be a leak or broken actuator
On the side of the rd, trucks not moving. Transmission sensor on
Where are you located ?
Con el software de diagnóstico puedes hacer varias pruebas para determinar cuál puede ser la posible falla, en ocasiones he tenido problemas de leak de aire, pin bushing con un número de abort counter muy alto que cambiarlo updated, o problemas con el Input shafts brake. Saludos
Que software o programación necesita para el diagnóstico?
DDDL 8.0 up
I have DT12 when ever I come to stop the truck goes into N I was looking for a machanic where can I gett this man’s information please!
My transmission shifts higher gear than what it supposed to be for the truck speed! For example it shifts from 6th gear to 9th gear on 15mph or from 8th to 11th gear on 30 mph. It makes the engine die and rpm very low that i have to down shift it manually! Do you what is wrong with it?
Did you fix the issue?
Francisco, several of us are having problem with engine revs up between shifts from even to odd number shifts. No codes shows up. Any idea what that might could be?
Did you find your problem?
I got a reply on a truck forum. It's the countershaft brake.
buenas tardes francisco sabes cual toma de fuerza le queda a este tipo de transmicion?
Atras en la bomba de aceite
I have 2015 Cascadia dd13 with Dt12 transmission My truck drives and moves in Manual mode but will not engage the automatic mode when i press the button ? also randomly a LOW AIR transmission message comes on dash .. could it be the sensor ? or what can cause this to not engage Automatic Mode? any help would appreciate it!
you clearly have a problem. pull the fault codes to see what is the problem with your truck.
Sometimes when i switch from N to 1st or R all the air comes out from the shift controller's air exhaust. I change the clutch, clutch actuator, and split pin. Do you think shift controller is Bad?
who told you to replace the clutch if you had an air leak?
@@MrAron13055 The truck had over 700,000 miles at the time. Might as well replace it while the transmission was out. Also, the fingers had uneven wear
Hi, did you find out what the problem was? Mine is doing the same for every gear change.
Hi my transmission goes on N while driving...gears are changed fine....no codes...what ti can be?dd12 transmission cascadia 2017.
replace your split pin
So how long does it take you to do the transmission job
I’m a freightliner tech it usually takes a full shift, which is removing - repair - reinstall - verify repair, our shift is 8 hours
That’s quite fast and efficient and what will it cost
@@julienrogers1209 can you remove the transmission control module , the mechanical part, Without removing the transmission?
❤❤❤❤❤❤
spn 520970 fmi 7
When cold transmission going to neutral?
I have the same issue did u find the fix?
@yadpandher6024 yes sir fix it you need to replace cluch cylinder and clutch Activator plus clutch kit 👌
Removed the pentatonic solenoid and clean the oring and put back together
What are the symptoms of the fault ?
I have a 2018 CASCADIA that has the same transmission, sometimes it’s acting weird, when I’m in traffic it shifts to N when I slow down to almost zero and try to resume going without coming to a complete stop , I don’t know what’s happening but I have to come to a complete stop sometimes to be able to resume, please help me figure out the issue and is it signaling for a more serious problem ? Thanks
Do you resolve this issue?
Francisco how are you doing I have most of your professional heavy duty truck I want you to take me as apprentice so that I can learn alots from you am in Minnesota I will appreciate your help am currently over the road driver but I see we are lack of mechanic in the industry I like to work of engine am really a handy man I fix my own truck %80 mechanical issues
My 2015 Cascadia with DT12 transmission have some issue as the engine Revs when shifting gear 1,3,5,7,9,11 but it shifts fine when it shifts 2,4,6,8,10,12 what could be the problem please help me. Thanks
Same problem. What was the solution?
Did find out what problem is I’m also having same problem
Did you find out what the problem was?
Mine is doing the same except revs up on even number shifts. Have you found solution yet?
@@justinmorehouse7275did find issue I’m still having same problem haven’t got check out yet
I mean I have most of your videos I should have put it on my first comments
My DT-12 when cold doesn't want to go from 6 to 7th gear. Only after I warm engine for 1 hour.
sounds like the Split Pin is stuck
@@solidgoldeazyaction What about the range piston seals leaking when cold, possibly?
@@ThatOneGuy-hp2pb you got to hook it up to a computer and check the shift aborts counts on range piston and split pin to know exactly
@@solidgoldeazyaction cool
Hey did you figure it out that 6 to 7th gear issue ?
Will this cause high revs between even gears as You accelerate?
I have same problem did you find out what it was?
No not yet. Still having the issue. And also give into gears too high for the slow speed, causing it to bog down and I have to downshift manually. Big headache
Did you find out what it was?
My is doing the same, revs up from even to odd shifts only. How you had it figured out yet?
@@kevinhicks3294 hey bro did every find out what was the issue on your transmisión
This transmission is not bad because it’s manual automated , it goes bad after tons of miles on it and what goes bad is bearings only , the only thing is computer and actuator assembly only
I Have a code on my dash saying
Gear Pos. Sensor Problem Detected Shifts Inhibited
2015 automatic Frieghtliner cascadia
Which it’s not allowing me to go into to gear once I go into gear it just Beep
I had water in my air tanks I had to drain out
It started to work but next day
Same thing happened
Fault code spn 521485 fmi 2
I have the same code, did you fix it? And how ?
Put a manual in 4k repair
Hola Francisco.. podria ser tambien en español... saludos
En esa transmision es mas comun que falle el modulo o el cableado ???
My transmission acting up like crazy 😢
Did you solve the problem
🤔i can sense too much knowledge in your brain you just need to find a way to articulate a little more slow .Keep it rolling with this interesting and informative video.
My transmission wont let my truck start it just shows dashes instead of neutral what can it be?
Stuck in gear, usually.