#2R. Reverse Alto Red Eagle Power Pack clutch set for AOD / AODE / 4R70W transmissions. Fits some 1990 to 1993 AOD transmissions with stamped steel reverse drums. Provides more friction surface for torque enhancement and the ability to provide better heat dissipation, for longer clutch pack life. This kit will also improve the performance of a trans brake. Changes a 4 plate drum to a 5 plate drum.