Forum Discussion

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 ...
donn0128's avatar
donn0128
Explorer II
Jan 07, 2014
Search online, there have been a lot of cooling line failures on GM Allison.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,410 PostsLatest Activity: Aug 30, 2026