4spd vs 6spd Allison question.
If I can find 2007 Chev/GMC 3500 with the 8.1 I would like to think about picking one up. I drive my 2002 by the tach, 65 mph=2100 rpm. That seems to be the sweet spot for best mileage. I know I am...
Forum Discussion
The reason for trading a truck with 14K miles was to get the Allison 5 speed, 410 rear and dually for towing the new 2001 35 ft alpenlite. Only auto and the 1st year for both engine and trannie. Traded in 05 for the duramax but the 2001 truck at 58K miles was the same as new. Only trip on a very windy day though El Central to Yuma was the only time the mileage was under 8 mpg but almost 8. I only traded it because of we could I guess.
chevman
chevman
