10.FINAL REDUCTION/ TRANSMISSION SYSTEM MXU 300/250 Secondary Driven Bevel Gear Shim Remove the secondary driven bevel gear and shim. Secondary Driven Bevel Gear Shaft Remove the secondary driven bevel gear shaft from case. Shift Shaft Oil Seal TRANSMISSION CASE COVER BEARING/OIL SEAL REPLACEMENT Inspect the shift shaft oil seal and speedometer gear oil seal for wear or damage. If any defects are found, replace the oil seal with a new one. Speedometer Gear Oil Seal 10-21