I replaced ball joints in January, so I went through pulling axles and hubs as part of the repair. I found the 4WD axle socket at Autozone, and was lucky enough to pick the right one the first time (there were three types they sold).
Its a relatively easy process, but lots of steps. Most of the videos show trucks with locking hubs, but mine with fixed hubs was several steps simpler. I also found that that the store has one big parts diagram that shows all the seals on the axle and hub. The parts guys had difficulty understanding which one I needed, so I recommend pulling the old seal first and bring it in for comparison.
Its also a very messy, greasy job, and I made the mistake of doing it outside in 35-40 degree weather. The new high temp grease I bought was so sticky in cold weather that I could stretch about an 18" string of grease before it would come off the bearings or hub. It really made a mess when I was trying to grease things during assembly. Buy some nitrile gloves.
Bruce