Not what I want to be doing right now, but the jeep I just bought had a replaced rear axle from the PO, after snapping my drive shaft I found there are different gears in the front then the back. Don't have money to have a shop gear both axles with the 4.56 I want, but a 3.73 set in the rear would at least give me 4x4 back, and I will attempt to install my self. So if you have a set laying around you want to donate or possibly cheap, please let me know asap. thanks so much.