I found a tranny for a great price that the guy says is an "overdrive 700" GM tranny. He is not sure of the year, he had it in a camaro he restored untill it was t-boned. It has a one wire switch that supposebly kicks in the overdrive. It does have one wire comeing out of it on the left side along with the speedo. The oil lines come out the right side. Does anybody have a glue on how I can tell what this is and if it is worth me messing with. Thanks everyone.