torque converter with lockup clutch function of the input and output rotors. function of the stator with functioning free wheel. function of the lockup clutch by a disk system and a hydraulic piston. description ordernumber 1159 see also: Torque converter with centrifugal pendulum-type absorber dry duplex clutch rear-wheel drive with disk locking system Mercedes-Benz 7-speed automatic transmission (hybrid)