Traveled to customer and raised the truck up. Turn drive unit left the power up. It auto centered. Same for right. Some motion in bearing also seemed dry. Lubed while cycling unit. Proximity switch light would flicker while shaking drive unit. Didn't after lubing the lower ring. Lower back to floor and lower the adjustment on proximity switch. Test and let customer use while picking up and paperwork was filled out. No problem. Have not been on a callback to said unit.

Thank you for the information. I will alert if it fails in a week or so.