Originally Posted by e-jeep
This is why I'm considering 4.56 and 33" tires. But if there's no major issues running 4.88s and 32" tires for an extended period of time (and I drive a lot) ...then I'll do what I want to do..
there are lots of threads on gearing. There are even some gearing charts in the Forum for auto and manual trans set ups that will chart out your expected RPMs. Consider the cost of re-gearing, which is between 1000 and 2200 depending on new or used, if you need new carriers (which you do to go from 3.21 to 4.56) and who does the work. You want to get it right.
Take where you live and how you drive into consideration. Where I live 4.56 is perfect for 33s, and I would even go a little bigger if I didnt' tow. Hilldweller would recommend 4.88 gears based on where he drives.