Setting Pinion Depth

Pinion depth (the distance from the face of the pinion gear to the center line of the ring gear) is critical to all differentials. Each ring and pinion gear set is matched so as to produce the best tooth contact pattern. Pinion depth is controlled by placing the proper selective shim between the pinion gear and inner bearing. Pinion depth is set with J 21777-B pinion setting gage set which provides a "nominal or "0" as a gaging reference to find the pinion center. If the original ring and pinion gears and pinion bearings are reused, the original size selective shim will set the proper pinion depth.