tracyb
Well-known member
4.56 is what i put in my 6.2 truckMy 4 speed auto has one overdrive. The 5 speed and 6 speed automatics have two overdrives which would be nice. Nice that is your putting out enough horsepower to make use of them. The 6.2 truck I’ve got never uses 6th. It’s a useless gear as is. Running stuff through the gear calculator I think 4.56 axle gears would be perfect for stock tires.
its weird how quick it shifts into the upper gears, at first dumbass me didn't think to reset the computers. no tuner just a tranny relearn and there are zero down sides. and i dont even notice the change any more. was stock 373
since i put the 4.56's in that truck now i plan to regear my 5.4 truck with 3.73. i only went up a little from stock tire size to what measures just under 34" and i'm thinking either 4.88 or 5.13s. even unloaded, although with a flatbed that weighs more than factory, it hardly ever shifts into over drive. with anything hooked up its usually in 3rd/ 4th on the highway.