Pretty easy. You will need a big C-clamp, metric and sae sockets, pair of jack stands, jacks, pb blaster or whatever you prefer, and some locktite.
Basically what you will be doing is removing the two u-bolts, then dropping the axle till the leaf spring is no longer under any pressure. Then you will either disconnect the leaf spring from the jeep or leave it in there. That's up to you. I prefer to remove the spring but some prefer to leave it in and not deal with the two 21mm bolts. If you plan to remove the leaf springs, have a 21mm socket on hand. Then you'll clamp the springs with the c-clamp near the center pin and then remove the center pin. Release the clamp slowly and allow the pack to come apart. Insert AAL in wherever it goes, stick a narrow screwdriver into the center pin holes to line up the springs and clamp em together with the c-clamp. Insert center pin, tighten, and then reinstall spring. Repeat on other side.
It's really quite simple and easier than the front.