Modern Overdrive Transmissions for Muscle Cars & Customs

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American PowerTrain - Transmission Kits

GM - Transmission Kits
The ProFit™ Systems 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. Check out the video to learn more about the Pro-Fit and Basic Fit Kits

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