Not sure how to go about replacing it. The appears to be a snap, but the rear is definitly more involved. Does anyone know of a good link or description?

axle shaft, rotor, caliper and hub has to come off. Then you can press out the broken stud and press in the new one. When you go to the dealer, make sure you get the correct length stud. There are several different sizes and it took three trips to the dealer to get it right. :(

Its been a while since I replaced one of mine, Ill see if I can find some pics of when I did it. Having a press is a must.

Ben

Here's a link for replacing the seals. It should show you what you need.
http://dieselplace.com/forum/showthread.php?t=84927

Here's the type of axle nut wrench I used:
http://www.thetoolwarehouse.net/shop/OTC-1929.html