stmanser - I got a video on how to rebuild a 9" rear as well as a 1970+ C4 transmission rebuild video for $50 shipped from http://www.badshoeproductions.com/test.html. I've watched the 9" video and the guy explained pretty well what you have to do, pitfalls to avoid, inspecting parts for reuse, rebuilding a posi clutch, pressing on and off bearings, etc. It was filmed in his own garage. I think they charge $35 for 1 video but I went ahead and got the C4 rebuild for an additional $15. I would recommend it, though someone may know of a better choice. That is, if you want an addition to your car repair library. Jamie