Quote Originally Posted by DUST1N View Post
Do you know if allisons have this? My truck has been in the shop getting a trans so i have been pulling with my fathers duramax. When its down in the 30s or below his trans gauge doesnt even move past the 100 degree mark. Just always thought it was odd mine would get up to temp and stay there and his would always fluctuate.
Allison’s up-to 2013 do not. Right from trans to the cooler.

While it does not get really cold in PA, I would put on the winter front on Dmaxs when temps dropped below 40.

That would get trans fluid to 110-150 empty or towing less than 10k between a outside temp of -5 to 40.

With the new truck I am also using the winter front and will be installing a revmax bypasss or similar shortly.