Okay so I have got my new Spirit running. But the SR4 trans is toast. It has no 3rd or 4th gear. 1st, 2nd, and reverse work fine. Are these easy to repair? Or should I swap it out to another model tranny? I have no idea where to locate a donor trans that will bolt right in with no hassle. All I can find around my parts are 4 wheel drive manuals. Nothing for 2 wheel drive AMC's. I have heard that mustang trannys will fit but not GM? I guess for now I will drive around with the gears that work LOL. Any help is greatly appreciated.