1967-1976 Mopar A-Body TREMEC TKX & A41 4L60E Transmission Kits

Transform your 1967-1976 Dodge Dart, Plymouth Duster, or Scamp into a modern highway performer with our PerfectFit™ Transmission Kits. While this generation of Mopar A-Body is a favorite for high-performance builds, factory non-overdrive gearboxes often limit their versatility. We offer the industry’s most refined swap solutions: the streamlined TKX 5-Speed, engineered for a low-profile fit in narrow A-Body tunnels, and our precision-shifting A41 4L60E Electronic Automatic.

Our kits are specifically designed to clear the factory torsion bar crossmember and floorpans of the 1967-1976 chassis, delivering significantly reduced cruising RPMs and improved fuel economy. Whether you are running a classic LA-series small block or a modern Gen III Hemi, our systems arrive as a total solution. Each kit includes the high-quality components necessary for a professional installation that maintains your factory interior appearance and shifter location.