1960-1969 Impala / El Camino / GTO
are the easiest and most economical way to put a high strength,
modern overdrive Tremec TKO 5-speed transmission or T56 6-speed
transmission in your car. Our Custom Engineered ProShift™
Tailhousings and Shift Mechanisms provide the smoothest
operation, the shortest throws and the only true internal offset
in the business. Enjoy a ProFit transmission with low RPM
cruising, and great fuel economy today.
Only American Powertrain's SuperShift™ Systems provide every
component needed to replace your stock transmission with an
overdrive 4-speed automatic, right down to a stock appearing
4-Speed Shift Selector for the console. Install SuperShift™
in a weekend and begin enjoying the hot performance, great fuel
mileage, extended cruising range and quiet highway operation of
The SuperShift™ System without decreasing the value of your car.