1988-2006 GM Truck (GMT400 & GMT800) TREMEC TKX, Magnum, & A41 4L60E Transmission Kits

Enhance the strength and performance of your 1988-2006 Chevrolet or GMC truck with our PerfectFit™ Transmission Kits. Covering the legendary GMT400 (OBS) and GMT800 platforms, we provide the industry’s most robust overdrive solutions. Whether you’re looking to replace a tired NV3500 with a crisp-shifting TKX 5-Speed, handle massive LS-power with a Magnum 6-Speed, or upgrade to our precision-controlled A41 4L60E Electronic Automatic, we have the total solution.
 

Our kits are specifically engineered to integrate with the GMT chassis, offering a massive leap in torque capacity and shift quality over factory equipment. These systems are designed to fit your interior seamlessly, preserving the look of your 88-06 cabin while providing the overdrive needed for quiet, efficient highway cruising. Each kit arrives complete with all the high-quality components necessary for a professional, bolt-in installation.