I have a 3.9 open diff for an e21 and a very nice Getrag transmission from an early 2002 for sale. This was the 4spd model I think? and it has the unique 4 bolt yolk in the rear and will include a good flex disc with it. The tranny is stamped 018294BN. Both are in fine working order.
Tranny 150 obo -
Diff. 80 obo
Tranny 150 obo -
Diff. 80 obo