I ordered the mode shifter, along with tub bearing and washer. Taking the washer apart, I could see the seal had failed, causing the bearing on the mode shifter shaft to fail. Too bad they don't sell just the bearing itself! Replaced the tub bearing and washer as well since I already had the machine apart.
It now purrs like a kitten.
Thanks Haroldsappliance! I'm donating $20 to the site. I really appreciate your expertise