2002 GMC Sierra tranny leak

Tiny
BILLMCCOY
  • MEMBER
  • 2002 GMC SIERRA
  • 6.6L
  • V8
  • TURBO
  • 4WD
  • AUTOMATIC
  • 89,000 MILES
I noticed a fluid leak at the bell housing thinking it was a front pump seal I began to tear down when I discovered the torque converter bolts were loose as a result of the loose bolts there is a hairline crack at the torque converter and I don't know what else may have been damaged Shouldn't GM or Allison be responsible for repairs what to do now?
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Wednesday, January 15th, 2014 AT 10:03 PM

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Tiny
CARADIODOC
  • EXPERT
Really? We all know GM pulls a lot of tricks to cost owners money in big repair bills, but exactly how long do you think they should warranty their products? You have to agree that if they did something wrong on the assembly line where the same people do the same job over and over exactly as they should be done, the problem would have shown up a long time ago.

Normally loose torque converter bolts will cause a banging noise. That is more common than you might think, on any car brand, but it rarely causes a crack or a leak. There really isn't that much force in that area, but if the leak really is in the torque converter housing, I would entertain attempting to weld it right on the truck. The challenge is going to be getting the transmission fluid residue out of there. Normally the torque converter can not be drained since you'll rarely find a drain plug on them like there was years ago, but with a leak, you may be able to get it drained overnight, then wash the area with brake parts cleaner. You don't have anything to lose. The only other alternative to replacing the converter might be to clean the area and use an epoxy product like JB Weld. Chrysler has two really good RTV gasket sealers, (other manufacturers have the same products with their own name on them), but there is going to be significant pressure in there, and I think those sealers at best would be a short-term temporary fix. The black sealer stays more rubbery and will not bond and seal if there is any hint of fluid or oil residue. The gray sealer will seal through oil residue but the surfaces still should be cleaned as well as possible. I have a minivan with a 1" by 2" hole that got punched in the gas tank. I used the gray sealer for a temporary fix, ... Over 20 years ago. I would never do that for a customer but it shows what some of those products can do.
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Wednesday, January 15th, 2014 AT 11:19 PM

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