Equip your semi to be Ready for the Road Ahead , with the Torque Technologies 15.5" x 2" 9-Spring Clutch, a crucial element that provides a seamless transition of gears. Thanks to its specialized design, this replacement clutch is able to engage / disengage the engine from the transmission, permitting the safe change of gears. Crafted with top-tier materials to transmit maximum power, reduce drag, and deliver a smooth engagement. FleetPride is your First Click in Heavy Duty .