Not everyone has the garage/driveway space, experience and/or the necessary tools. I pull the shafts (takes about 10 mins tops) and take them to NAPA with some new u-joints since I don't have a vise and I hate trying to pound them out. They're done and ready to put back in $10 and 20 minutes later while I eat lunch across the street.
Build n' stuff: http://www.jeepforum.com/forum/f177/99-sport-build-thread-grocery-haulin-panache-1179209/
Cherokee Of The Month Winnar! - September 2012