1963-1972 GM C-Series Truck TREMEC TKX, Magnum, & A41 4L60E Transmission Kits

Modernize the performance of your 1963-1972 Chevrolet or GMC C-Series truck with our PerfectFit™ Transmission Kits. Specifically engineered for the iconic C10 and C20 pickups, we offer the industry’s premier overdrive solutions. Choose from the streamlined TKX 5-Speed, the high-torque Magnum 6-Speed, or our smooth-shifting A41 4L60E Electronic Automatic.
 

These kits are designed to provide a seamless fit into your 1963-1972 chassis, delivering significantly reduced cruising RPMs and a transformed driving experience while maintaining the classic look of your bench seat or bucket seat interior. Each system arrives as a total solution, featuring all the high-quality components required for a professional, high-performance installation that turns your vintage workhorse into a modern highway cruiser.