If you use the seal puller A.K.A. "miniature medieval weapon" be careful what you pry on as I did this last weekend and there was some damage to what lies behind the seal.

Another thing I had problems with is the differential mount bottom bolt. It wanted to cross thread. Use a pry bar to position the differential it to where it needs to be. If the bolt don't go in with hand pressure don't force it. It will cross thread. Been there done that.