Here is a very good website ... Stu has alot of write-ups on projects you can do at home.. I have been back to it many times.
hopefully its not a repost..
http://www.stu-offroad.com/axle.asp
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Member of the 2009 Board of Directors
1998 TJ, 4.0, auto, 3 link front, 4 link rear, fox coil overs, boat sided, 38.5 SX's, 44 front e locked, 9 inch rear spooled.
"They dont like that its PURDY and capable"
2008 Duramax Crew aka "Krawler Hauler"