I still like my Muggy...pull two screws out of the chassis and if you can reach around the bumper there's only 4 more screws (I just remove the bumper though, 2 more screws and makes it much easier). Once you've got the plastic hinge pin cover off remove 2 hinge pins and drop the bottom (or top) control arms out of the way, pull 2 plastic inserts out and the entire diff and center shaft comes right out. THAT is a 2-3 minute job.
EDIT: Re-assembly is just as easy