Ok so I bought a seal from the dealer that is suppose to be the seal for where the through shaft comes out of the motor on the front. They also sold me a wear ring and said I probably needed to replace it. Well the new seal has a bigger i.d. Which the wear ring seals against nicely and there was no wear ring on the through shaft from the factory and the seal had a smaller I.d. So my question is did they sell me the wrong stuff or is this a upgrade/modification