1046907
4.10 or 4.56 are your two choices. 4.10 will be a little taller than stock, lower rpms on the highway and a little faster crawl speed offroad.
4.56 will be lower, more rpms on the highway, better passing and uphill, slower more controllable crawl speed.
Each one is give and take, depends on what you will use the Jeep for.
What ratio do you have now?[addsig]