I have a 2500HD, towing package, Duramax LBZ engine with the 6 speed Allison transmission. Last week I had a 33ft 5th wheel (approx. 15,000 loaded) and traveling approx. 70 mph I had the Allison overheat and the fuel air mix cut my power down dramatically several times. It was about 97 degrees F. I lowered the speed to 60-65 and the issues subsided. Has anyone else experienced this? Do they make an upsized transmission cooler?
I'm kind of pissed that I bought the biggest engine /transmission package available and then had other truck/trailer combinations with similar weight ratios shooting by me while my trouble light was on and the power was shut down to 60% or whatever.
I'm kind of pissed that I bought the biggest engine /transmission package available and then had other truck/trailer combinations with similar weight ratios shooting by me while my trouble light was on and the power was shut down to 60% or whatever.