Replacing the shift actuator resolved the issue. After purchasing an inexpensive but faulty part from another vendor, I bought the shift actuator from AppliancePartsPros.com. This redesigned part makes it slightly more difficult to plug in the wiring harness. Once installed, it works flawlessly. I learned how to do this by watching a few YouTube tutorial videos. Only tools needed were a phillips screwdriver, a 5/16 inch socket bit screwdriver and a flashlight.