Street Rod & Early Truck TREMEC TKX, Magnum, & A41 4L60E Transmission Kits

Bring modern driveability to your custom build with our Street Rod & Early Truck PerfectFit™ Transmission Kits. Whether you are finishing a 1932 Highboy, a fat-fendered '40s pickup, or a unique post-war custom, we offer the industry’s most compact and reliable overdrive solutions. Choose from the streamlined TKX 5-Speed—engineered specifically for tight floor tunnels—the high-torque Magnum 6-Speed, or our smooth-shifting A41 4L60E Electronic Automatic.
 

Our kits are designed to solve the packaging challenges of custom chassis and early floorboards, delivering significantly reduced cruising RPMs for long-distance power tours. These systems arrive as a total solution, featuring versatile shifter positions and high-quality components to ensure a professional installation. Transform your vintage street rod or early truck into a reliable, high-performance cruiser that handles modern highway speeds with ease.