I have been talking about rebuilding my 4r100 on here for a while now. I have found a 2002 4r100 4x4 from a van that i will purchase so i can rebuild that one instead of what is in my truck. When i was in a accident a crack developed along the top of my current trans and destroyed the housing between the tail and transfercase. I had it tig welded but my buddy who will aid me in rebuilding is not to confident about the welded trans.Yes they do. They have to also match bellhousing patterns.