Kevin, I'm sure you have checked the clamp at the bottom for tightness and if the splines in the joint and on the shaft are good. There is a pin that runs through the dogs(bearings) that also runs through the steering shaft. I have never seen one that sheared but yours must have. You will need to pull it apart and the bearings will slip right off the pin but you need to support the steering shaft and drive the pin, or what's left of it, out of the shaft. I think the pin is a standard size like 3/8 or 7/16 but don't know if still available. I'm sure they are hardened steel so if you have to make a replacement yourself be sure to use a grade 8 bolt with a smooth area long enough to cut your pin from. A high speed cut-off wheel will cut grade 8 where a hacksaw won't. Good luck.

Evan