From transmissions, torque converters and shifters to flexplates and controllers, TCI Automotive® is the absolute leader in drivetrain technology. TCI automatic transmission components are known for bulletproof reliability and are built with cutting-edge equipment. While the customer base was at one time made up almost entirely of drag racers, today many products are directed at street performance. However, hardcore racers on both the drag strip and the circle track still have plenty of options to help them put the power down.