15. REAR WHEEL/AXLE/SUSPENSION DRIVING MECHANISM MXU 300/250 PINION GEAR BEARING AND SHIM REPLACEMENT Pull the pinion bearing from the shaft with a commercially available bearing puller. Remove the pinion shim. Install the shim and bearing onto the pinion Pinion Gear Bearing gear. When the gear set, ring gear bearing, and/or gear case has been replaced, use a 2 mm (0.08 in) thick shim for initial reference. Shim . Drive the bearing with the marked side facing up. 15-33