Im looking to regear also I have a 98 XJ with a auto tranny and a 231 tranfer, Im also running 35 XTerrains... From what I gather 4.56 wont work good? I do a lot of highway driving, Im looking for the best fuel milage, power, and able to pull my trailer around once and a while.. For the best over all will 4.88s work best or should I go bigger? Looking for answer from the same....