11.FINAL REDUCTION/ TRANSMISSION SYSTEM MXU 500 IRS ASSEMBLY/INSPECTION Reverse Drive Gear Stopper Wheel High Drive Gear Washer High/Low Gear Clutch dog Low Drive Gear Clip Reverse Gear Clutch dog Inspect the gear teeth. Blue discoloration/pitting/wear Replace. Inspect the mated dogs. Rounded edges/cracks/missing portions Replace. 11-28