DAG-GONE!! I tore another one! Jeff, I think I'll try your way the next time. It looks like it'll fit, but real tight. I oiled the heck out of it and slowly tapped it on with a piece of wood. As soon as it started going on the shaft, it seemed to smash the rubber ring and the tiny spring inside the rubber seal started coming out. It sure doesn't go on easy though.

I'm afraid if I put tape on the spline, it'll make it even tighter.