1) Remove tire and rim.
2) Remove drive hex and pin from the axle shaft.
3) Remove the allen headed lock pin (from the bottom) that is at the differential and slide axle off the diff.
4) Remove the front outside shock at the lower A arm. Compress the shock through and out of the upper A arm.
Viola. Pull the axle shaft outta the steering knuckle and replace.
Reverse procedure for reassembly.
Also, if you want, attach a body mount cushion to the end of the axle shaft where it mates with the differential. Doing this will keep dirt and junk away from the bearing. This really helps out if you still use the original 2.5 diffs that utilize metal shielded bearings. I upgraded to 3.3 diffs (rubber shielded bearings) after I grenaded 3 2.5 diffs from playing in the sand.
Hopes this helps you out.
Now that you are back together, get out there and see what else you can break! lol