differential locker
If you already have 4.56 gears the locker install is relitively simple. all the adjustments are on the ring and pinion. No need for install kits, bearings or shims & crush collars. The ring and pinion depth are already set so there will be no need to change them. There is a group buy on Moe's forum right now, you can join up and save even more. I dont think I am suposed to hype another forum so I wont list a link. But if you look I am sure you can find it. If not, PM me and I will help.
its not always a straight foward install with a locker or limited slip, especially b/c the bearings are pressed onto the carrier that you have it impossible to get thenm off without ruining it..So i would say not soo straight foward, i installed with my firend his front gears on his YJ 4.10's then a couple of weeks later his detroit came in and well we had to cahnge the pinion and ring gear shims..



