Quote:
Originally Posted by PRO-4 #31
I will check into it but i have had my truck over a year with only 10k on it i drive my trusty 7.3 that get 15mpg cant afford to drive the damm thing i love the truck just cant deal with the fuel millage and my dealer cant help its had the rad done for a leak and the update flash and it got 14mpg then went down hill since and back to 9mpg. I pull my race car trailer to a race that's 250 miles away and cant make it there and home with out stopping for fuel 38gal tank SAD. How much mpg did you get after adding the tunner?
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I don't have Spartan yet. I have researched this to death and no one seems to have issues with these things. Fuel mileage will start at 2-3mpg better and go all the way to 5 or 6 better depending on how you drive and which Spartan tune you use as the higher ones do better. GM trucks cannot take the higher tunes on the factory Allison cause there only designed for around 500hp. In order to run the higher tunes they must beef up the tranny. The Torque Shift can handle up to around 600hp or so. I believe these numbers are correct but if not someone will correct me. The one thing i know for sure is the Torque Shift is much stronger a stock Allison. Allison however has plans to upgrade their tranny in the next couple of years. I hear they may be going as high as 8 speeds but not sure.
