Originally Posted by RonP

I had Tim's tranny mods for a long time and never saw that kind of mileage. I do have 4.10's though. Those mods finally gave out with Beta 4.4 and now I have a goerends that holds the power no problem but I didn't get any great mileage increase with it. Those are some good numbersd, but as pointed out, there are way too many variables. I would bet if I drove the 22mpg trucks, it would be more like 17-18 and thats not hotrodding, just the way I drive.