I overhauled the Dana differential yesterday looking at the internals its heavy duty and bullet proof made in the USA, cleaned lubricated and new seals its ready to be assembled to make up the Jaguar IRS (independent rear suspension). Inboard rear brakes next I have decided to leave out the rear cage and make a cross member for the diff to mount to you get to see all that engineering Jaguar techs developed and it just gives it a better look.
posted a few extra pics of the differential
http://www.flickr.com/photos/moff1959/sets/72157627429556918/