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BobsYourUncle's avatar
BobsYourUncle
Nomad
Jan 07, 2014

Allison transmission sprung a leak. Anyone else?

On a recent trip to Alberta to work for 5 weeks in the cold, I noticed red stains in the snow under the front of my truck. 2007 Classic GMC D/A. I have 222,000K (138,000 miles) My Allison trans ...
sjholt's avatar
sjholt
Explorer
Jan 13, 2014
Probably won't hurt and may help- go down to your nearest parts house(Walmart too) and get some K&W transmission sealer (Trans X at Walmart) and put it in your trans. If the leak is a couple of spots on the driveway- this may cure it by swelling up the seals.
I just used Trans X to seal up the rear main seal in my wife's 2004 S10 Blazer.
Yes- it does work. Try it and it may do the job.
The seals dry up from age and heat and need to be softened and swelled up again.

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