F7E1 error after changing gearcase

I have a Maytag MVW4505MW0 washing machine. It had a noisy gearcase bearing. I replaced the gearcase, performed a calibration and received a F7E1 error code. I cleared the codes and repeated calibration and received the F7E1 code again. I obtained the Tech Manual, followed the troubleshooting tests 1 & 3A, replaced the shift actuator, calibrated and received the F7E1 code again. Cleared the code and replaced the capacitor. Calibrated and received the F7E1 code again.
When running the component activation tests, the machine completes the fill and drain tests, the direction tests and errors on the speed tests. The motor makes a loud humming sound during the speed tests.
I have verified that the splutch moves easily, is intact, engages properly and that the tub and agitator move freely and easily. The motor spins freely, shows no signs of damage.

The mainboard has a proper flashing green LED, the motor resistance checks within range through the harness. The harness is intact without damage. The board is supplying voltage to the motor.

This machine is about two years old and has not even gotten dusty yet.

I'd be most grateful for any advice on how to get this machine running properly again.

Thanks!