well, I bought it online (ebay) so it might be a little complicated. Also, I believe the pinion gear and the spur gear are meshing corretly. Its firm but not too firm and rotates smoothly.
http://cgi.ebay.com/ws/eBayISAPI.dll...7865&rd=1&rd=1
If you would like to see the rear diffs, I could send them to you and you can take a look at them.