I was hoping that someone could tell me what the difference is, if any, between a 95 S420 transmission number 722.366 and a 95 S500 coupe transmission with the number 722.370. My trans. is shot, but I can get the S420 trans for a good deal and want to make sure it works right. Might be just a gearing issue, or just a different number, but I want to be as sure as possible. thanks for the help.