I was wondering if there is a program available that will tell me, quantitatively, how much faster 0-60 a swap from 3.55 gears to 4.10 gears will make my truck.

Folks say, "Yeah it'll make a big difference", but "big" is subjective...

Thanks,
Mike

 

Don't know of a program, but 0.3-0.5 in the 1/4 mi. is a realistic estimate. YMMV