Just a tip for those who find that the water pump shaft sealing area is worn and want a way around buying a new drive shaft. After removing the water pump assy.,loosen the top fill plug a bit to vent the gearbox, and pull out the drive shaft. Measure the distance from the lower spline to the impeller key pin hole. Flip the drive shaft end for end and drill a new drive pin hole at the same distance from the other end. Presto, a fresh sealing surface and more years of good service.
