It's a 30SCTT. I'm talking about the big (about 2-3" dia.) pin that is welded into the frame that the whole mast bolts to, where the trunion cap is. The mast and drive unit must be removed to get at it. There is a service bulletin that explains how to do this repair. Luckily it's on hold for a few weeks because they had a major repair to their delivery truck they are dealing with.