Did you use a case spreader? I'm doing my ARB install and I was able to get the old carrier out of the housing using a clawhammer without too many problems... I also got the ARB in by using the carrier caps to suck it in without too much of a problem either. But, my backlash was too little and I need to pull it out again and that thing will not budge. The ARB takes up all the room in the housing so I can't get the hammer back in... Bout ready to hook the winch to it and yank it out... Took me about 1.5 hours to get the old one out gear swapped, bearings on, and installed, and I spent 3 hours trying to get it out till I gave up. If I have too I can build a spreader but really don't want to.