3.91 Diff I have purchased an used 3.91S (small case) diff I'm curious what car it comes from and where to buy refresher parts clutch discs etc. from. Its installed in the car and working OK and also It has an extended output flange so that e30 med case diff axles could be used. I got the axles with some other parts Trailing arms etc. so I could run med case diffs and found this small one from another source, and I guess got lucky with the output flanges. Any help would be appreciated. |