G-Body TREMEC TKX, Magnum, & A41 4L60E Transmission Kits

Modernize the performance and cruising capability of your GM G-Body with our PerfectFit™ Transmission Kits. Whether you are building a Monte Carlo, Regal, Cutlass, or El Camino, 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.
 

Our G-Body kits are meticulously engineered to provide a seamless fit into your classic chassis, delivering significantly reduced highway RPMs and a transformed driving experience. Each system arrives as a total solution, featuring all the high-quality components required for a professional installation that preserves the factory look of your interior while providing modern, high-performance reliability.