So you want to install a TCI 6X transmission in your car? Well you'll need something to shift it with if you plan on installing the six-speed in a classic Mopar. The 6X offers the ability to control transmission functions such as shift points, line pressures, as well as converter lockup, but it isn't compatible with the shifters in older Mopars. Thankfully, this TCI shifter allows full control of the new TCI transmission, offering Mopar owners the most functional and modern drivetrain combination on the market.