Abstract: The present invention is an improved disc useful as a clutch plate. The disc has a major surface, preferably a flat planar surface, and a hole, having a hole circumference, through the disc at the major surface. Preferably the disc is circular with a concentric hole. The disc further comprises at least one tooth and preferably a plurality of teeth coplanar with the major plane of the disc, and extending from the hole circumference. Each tooth has at least one, and preferably two tooth side edges extending from the hole circumference. Preferably, there are a plurality of the same shaped teeth distributed uniformly along the hole circumference. There is a tab extending at an angle, preferably perpendicular to the major plane from at least part of at least one tooth edge. Preferably a tab extends from each tooth edge.

Abstract: The invention provides a tool for removing a lance or indentation in the retainer of the planetary of an automatic transmission and for forming a lance in the retainer after replacement of friction or steel plates. The tool includes a circular base having a raised curved exterior section and a raised curved interior section spaced apart by a gap. The interior section has an indentation in the outer wall. A first insert fits within the gap having a curved front wall facing the interior section and also having the same curvature thereof. A second insert is fittable within the gap having a protrusion capable of registering with the indentation. Means for exerting inward compression between the first and second inserts against the interior section are provided to remove a lance, in the case of the first insert, or to form a lance in the case of the second insert.