Originally Posted by StoneCold
The hub is straight forward enough. You need to remove the hub nut and cotter pin. The hub nut can be on very tight! There's a washer behind the nut, that obviously needs to come off too. The hub itself is held on with three bolts if I recall correctly. Undo the bolts and whack the hub until it loosens off. Clean everything up and fit the new one.
There is a good video tutorial on YouTube (type in Grand Cherokee wheel hub) and there's a two part video that will be at the top of the list.
Just some tips to add:
The hub nut can be a pain if you are trying to do it yourself. If you are by yourself, make sure you remove the wheel center cap and loosen the nut before you jack up the vehicle. If you have someone who can give you a hand for 30 seconds, have them step on the brakes while you loosen it (after you have the vehicle jacked up and wheel off).
Depending on the location of the Jeep, the hub could very well be rusted onto the steering knuckle. On my Jeep, no amount of hitting w/ a hammer would break it free. I had to get my 3 jaw puller and pull it off.
If the bolts are all nasty (they most likely will), I would recommend one of two things. One, get a die and run it down the threads to clean them off. Option 2, buy new bolts that will go in easy. When I did mine I put the first bolt back in w/out cleaning it and it was a huge PITA. I cleaned them up and it went in much easier.
I've never done the CV or boots. But once the hub is off, they are right there. I would imagine that the axle will slide right out once the hub assembly is off.