I have a '08 manual 3.8, with 2" lift, & 3.21 diffs. To be honest, I couldn't really tell much difference going from 255/75R17 to 285/70 MT, or when I went back to 265/70 AT. The latter, probably because the rolling diameter has not changed significantly.
I had to adjust the speedo by ~5% going from 255-285, but none when I switched back to 265.
The 285 fitted ok with the lift, but would rub just a little on the sway bar at the front. I never quite had the funds to regear.
__________________
Jeeps: Lego for grownups!
|