Abstract: A multi-plate clutch includes a plurality of drive plates that are rotationally coupled to a concentric shell wherein keys radially extending from each drive plate are slidably received in axial channels formed in the interior surface of the shell. The enhancement of the wear resistance of the keys of single one of the drive plates serves to extend the service life of the entire clutch.

Abstract: A multi-plate clutch includes a plurality of drive plates that are rotationally coupled to a concentric shell wherein keys radially extending from each drive plate are slidably received in axial channels formed in the interior surface of the shell. The enhancement of the wear resistance of the keys of single one of the drive plates serves to extend the service life of the entire clutch.

Abstract: A multi-plate clutch includes a plurality of friction plates that are rotationally coupled to a concentric shell wherein keys radially extending from each friction plate are slidably received in axial channels formed in the interior surface of the shell. The keys of all but one of the friction plates are dimensioned to have a relatively loose fit in the channels while the keys on a single friction plate are dimensioned to have a substantially tighter fit in the channels. This has a stabilizing effect on the entire stack without impeding the operation of the clutch. Rotational stabilization of the plates serves to dampen the impact of the edge of each of the keys of each of the plates against the channel sidewall during abrupt load changes in the drivetrain to thereby reduce wear and the generation of noise.