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

Modernize the driveability of your Mopar A-Body with our PerfectFit™ Transmission Kits. Whether you’re cruising in a Dodge Dart, Plymouth Duster, Valiant, or an early Barracuda, we offer the industry’s most refined overdrive solutions. Choose from the streamlined TKX 5-Speed—engineered specifically for low-profile fitment in tight tunnels—or our smooth-shifting A41 4L60E Electronic Automatic.
 

Specifically engineered to clear the unique floorpan and torsion bar constraints of the 1960-1976 A-Body platform, our kits deliver a seamless fit and significantly reduced highway RPMs. These systems arrive as a total solution, featuring all the high-quality components needed to transform your compact Mopar into a high-performance cruiser. Maintain your factory interior aesthetics and shifter location while enjoying the precision and reliability of a modern drivetrain.