With an automatic, the following works well:
4.56 with 33's
5.13 with 35's
5.38 with 37's
Even if you don't regear, you still need to flash the computer when changing tire size. The dealer can only flash to a maximum of 32" tires.
With 32's, you can go with 4.10's or 4.56. Without flashing the computer, your speedometer and odometer will be off.
As for as programmers, people seem to get the best results with superchips flashpaq. The AEV Procal is also popular.
2014 JKU Copperhead Pearl
Too many mods to list. Too awesome to sell.