1966-1970 Mopar B-Body TREMEC TKX, Magnum, & A41 4L60E Transmission Kits

Bring modern highway versatility to the most iconic era of muscle with our 1966-1970 Mopar B-Body PerfectFit™ Transmission Kits. Whether you are piloting a 1968-1970 Dodge Charger, a Plymouth Road Runner, or a Super Bee, we offer the industry’s premier overdrive solutions. Choose from the streamlined TKX 5-Speed for a low-profile fit, the high-torque Magnum 6-Speed for extreme big-block power, or our smooth-shifting A41 4L60E Electronic Automatic.

Our 1966-1970 kits are specifically engineered to clear the factory torsion bar crossmembers and floorpans of this legendary platform. By dramatically reducing cruising RPMs, our systems protect your high-performance engine during long-distance travel without sacrificing the classic Mopar aesthetic. Each kit arrives as a total solution, featuring all components necessary to maintain your factory shifter location—fully compatible with our Pistol Grip handles—ensuring your interior looks original while performing with modern precision.