Abstract: The retainer is a circular cam follower plate having therethrough three arcuate slots arranged coaxially of the axis of the plate. Each of the slots has a roller follower mounted in one end thereof for rotation about an axis extending transversely of the associated slot. The axes of the roller followers lie in a common plane disposed approximately coplanar with one side of the plate so that part of each roller is positioned within its associated slot, and the remainder projects beyond said one side of the plate. This permits the plate to be substituted for corresponding original equipment plates used in the clutches of continuous variable transmission of the type employed in snowmobiles, and the like, without requiring replacement of the associated cam which drives the follower plate.