General Information

Pinion depth (the distance from the face of the pinion gear to the center line of the rind gear) is critical to all differentials. Each ring and pinion gear set is matched so as to produce the best tooth contact pattern. This relationship (pinion depth) is controlled by placing the proper selective shim between the pinion gear and the inner bearing. If the original ring and pinion gears and pinion bearings are reused. the original size selective shim will set the proper pinion depth. Pinion depth is set with J 21777-B Pinion Setting Gage Set which provides a "nominal" or "zero" as a gaging reference to find the pinion center.