I know this has been addressed before but I thought I'd add my thoughts and a few photos. With the autozone press, you will have to make a couple of adapters to do the job - at least I did. I used 2 different pipe diameters and in one instance used a bolt to get the old bj out. This process worked for me, it may not go that way with you.
. This is just my .02 FWIW.
The axle shaft tapped out pretty easily with a SFH
All tools laid out close by
How it looks with the axle shaft out - a couple of wacks down with my SFH and the hub will fall down - MAKE SURE YOU TAKE THE BJ NUTS COMPLETLY OFF FIRST as the BJ stud will spin and you won't be able to loosen them.
Pressing the old Upper BJ out - you are forcing it UP
Pressing out the lower ball joint - you are forcing it DOWN
For final lower press out, I had to put a nut on the top.
Both out - I cleaned up the insides and coated it with anti-seeze
Old vs. new - I used Raybestos Profession Grade parts
Pressing in the lower - you are forcing it up - MAKE SURE YOU HAVE IT GOING IN EVENLY. I used a breaker bar with a short pipe to install it. If it doesn't turn with that set-up, STOP and see why.
Pressing in the Upper - you will note mypipe tube to press the other edge of the upper in. The AZ press didn't fit right.
Done deal - make sure you grease the bottom and insert the plug. The fitting won't fit (it didn't for me) to leave in there - it will hit the axle.
I also did the axle u-joints. They were a bigger ball buster than the ball joints. I broke one new joint when pressing it in.
I used a bench vice for the pressing in/out.
After pushing one cap thru, I cut the other cap and got it off with a 4" grinder
Axle u-joint installed. I got the one with the zerk. On high horsepower cars, I get solids but in the Jeep, I;m only running 190HP
I greased the splines of the axle tube and coated them (the end going into the carrier) liberly with gear lube before putting them back in. So far, no leaks. I still have to get to the the tie rod ends and maybe the ZJ tie rod upgrade.
If anyone sees any flaws above, please advise.