American Powertrain exists to help muscle car owners equip their cars with modern drivetrain technology, offering overdrive transmission systems, hydraulic clutch kits and a wide range of drivetrain related parts from diff to block. Since American Powertrain opened for business we have quickly become the world’s largest TREMEC dealer. Our installation parts and systems are proudly made right here in America for unmatched quality.Our staff of highly experienced enthusiasts has years of experience helping car owners and builders make the right drivetrain choices.