SUCCESS!! Its S-M-O-O-T-H now.

The back shaft was ever so slightly bent. The shop straightened it, rebalanced it, and went ahead and put a new carrier bearing in (preventive maintenance while it was down).

Cost me just over $260.00. More than what I wanted to spend, BUT, it cured the problem.

Thanks for the replies everyone!

Now onto the next problem......headlights.