Eaton’s first-generation UltraShift transmission uses a centrifugal clutch to “float shift” by RPM. The UltraShift™ 6, 10 and 13-speed transmissions use the DM centrifugal clutch, which engages and disengages without an in-cab pedal and helps to maximize clutch life. A two-plate configuration is used for heavy duty applications and a single-plate for medium duty applications. Soft rate dampers and ceramic facings provide smooth engagement.