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

Modernize the driveability of your GM A-Body with our PerfectFit™ Transmission Kits. Specifically engineered for the Chevrolet Chevelle, El Camino, and Malibu, the Pontiac GTO and LeMans, the Oldsmobile 442 and Cutlass, and the Buick GS and Skylark, we offer the industry’s best 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 classic A-Body chassis, delivering reduced cruising RPMs and a transformed driving experience. Each system arrives as a total solution, featuring all the high-quality components required for a professional installation.