Ran diagnostic test to confirm there was a Shift Actuator problem. Watched the helpful AppliancePartsPros.com repair video and then replaced the Shift Actuator. Washer now runs perfectly.
Additional repair notes:
I ordered part late Wednesday evening with standard shipping and part arrived two days later on Friday afternoon. Thank you AppliancePartsPros.com for the speedy shipping, the detailed repair video, and the ability to leave comments and read about the experiences of others. I very much appreciate the wonderful service you provide. From start-to-finish, you were a great help in turning my repair into a pleasant and empowering experience.