hope this helps, yes they have roller bearings each side. these need to have there preloads set when rebuilding box or changing bearings. the left is the front diff right is the rear.
ok Mr borg, here are the pics of the LSD in question:
passanger's side shaft insert. nothing interesting:
driver's side shaft insert. Note lack of bearing shaft???
Any ideas? I think there is another insert that goes into the shaft hole (seems like there are different/bigger diameter splines) where the bearing sits on.