Need to pull my transmission (2004 GMC Sierra 2500HD Duramax truck) to replace transmission front pump seal. I am looking for a manual to use a guide.........where can I find this?
XXXXXor 4? Allison trans?
Reply to Bob's Post: 4x4 Allison transmission. I want to pull the tranmission and replace the front pump seal. I have never attempted something this major (major to me) and want to have a manual on hand before starting.
If I sent you instructions for trans removal and seal installation, from the GM service manual could you print a copy? You may need to rent a couple of special tools, like a trans jack and a seal installer, etc. Your right, it is a major job and when the trans is out you want to be sure to inspect the edges of the converter for any nicks etc so it doesn't leak again when you put it back together. Thanks
Reply to Bob's Post: Can you send pages in digital (PDF?) format? If you can I could print them. I have a motorcycle jack that I think would work, but have no idea where to rent a seal installer (not sure what it looks like)...Is there any other seals you would reccommend I should buy and have on hand for this type of job? The mechanic at GM said the transmission pump seal is the problem, but then if I have the converted off the transmission, I want to have anything I need on hand. He will charge me $2900 to do this job...so far I can't figure out why its so expensive for a $12 part, how many hours labour does the book say to perform this task?
I can't convert it to pdf, but will send it in posts and you can try to print it from here. Any parts store will have a seal installer. When you buy the seal rent one that fits the seal. It is just a plastic tool used to drive the seal into place, will try to send a picture of one for you. You will spend a whole weekend doing the job. I do not have a flat rate manual, o can't look it up. You will need to remove the transfer case first, then the trans and converter. The special tools they mention for holding the converter are nothing more than a flat piece of metal to bolt over the front of the trans so the converter don't fall out. As long as your careful they are not needed. All you should need it the seal if the converter is not nicked or damaged at the seal surface. His price is awful hight though I can tell you that for sure.
Transfer Case Assembly Replacement Removal Procedure
Important: The following service procedure must be performed with the assistance from another technician.
Important: The following installation procedure must be performed with the assistance of another technician.
Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
Tighten Tighten the nuts to 50 N·m (37 lb ft).
Tighten Tighten the bolts to 47 N·m (35 lb ft).
Tighten Tighten the bolts to 70 N·m (52 lb ft).
Tighten Tighten the nuts to 40 N·m (30 lb ft).
Transfer Case Control Rod Replacement Removal Procedure
Important: Before beginning the following service procedure, place a automatic transmission equipped vehicle into the PARK position, place a manual transmission equipped vehicle into FIRST GEAR. Then place the transfer case in the 2 HI position.
Important: When performing this service procedure, use a small pocket screwdriver in order to release the retaining clip on the ends of the control rod.
Tighten Tighten the bolt to 15 N·m (11 lb ft).
Plus 40 years GM, over 30 certified with Chevrolet, ASE certified Master Tech. (Expired, Retired)
Ran out of room. lol I really think you should rent a trans jack as this thing is heavy and they are adjustable to change angle etc.
Transmission Replacement (With 6.6L Engine)
Important: If replacing a failed transmission, the "FastLearn" (adapt) procedure must be performed. This can be done in one step using a scan tool. If this procedure is not done, the transmission control module's (TCM's) adaptive values will still be at the settings that it learned for the old transmission, and will be in slow adaptive mode. Under these conditions, it would take an unacceptably long time for the adaptive values to converge to levels suitable for the new transmission.
Important: Rotate the engine clockwise ONLY, rotating the engine counterclockwise may loosen the crankshaft balancer bolt.
Important: Do not install the transmission by drawing it to the engine using the studs and bolts.
Important: Ensure that the torque converter can be rotated before tightening the bolts and studs.
Tighten Tighten the bolts/studs to 50 N·m (37 lb ft).
Tighten Tighten the nut to 18 N·m (13 lb ft).
Tighten Tighten the nuts to 18 N·m (13 lb ft).
Tighten Tighten the bolts to 50 N·m (37 lb ft).
Tighten Tighten the bolts/nuts to 95 N·m (70 lb ft).
Tighten Tighten the bolts to 12 N·m (106 lb in).
Tighten Tighten the bolts to 2.5 N·m (22 lb in).
Tighten Tighten the bolts to 25 N·m (18 lb ft).
Tighten Tighten the bolts to 60 N·m (44 lb ft).
Tighten Tighten the bolts to 20 N·m (15 lb ft).
Tighten Tighten the bolts to 78 N·m (58 lb ft).
Tighten Tighten the nut to 3.4 N·m (30 lb in).
Tighten Tighten the nut to 9 N·m (80 lb in).
There is a picture of a seal installer in this one. The removal tool is a slide hammer with a hook on the end. First picture.