01-04.5 LB7 Duramax Powertrain
I have a 2003 duramax with the Allison 1000 and I’m wondering if anyone has any insight to a new issue that came about.
Driving down the road the truck is in 5th gear, TCL. Drives and shifts great. However, going down a small decline in a hill it seemed as if 5th gear slipped (truck revved up)...