I have seals leaking and have got new ones but in the process of installing them I noticed what I thought was a bad shaft. I got on ebay and bought another clutch cover with everything in it for the water pump because my impeller had a broken vein anyway. So I get the other one here and the shaft looks the same. NOW on the side with the threads it appears that the shaft is two sizes about 3/8" up looks to be smaller by about .015 - .020 of an inch. Is this how they are made or do I have two bad shafts? Sorry for the long explanation.