Model Number: WTW8500DC0
Brand: Whirlpool
Age: 1-5 years

On spin cycle the machine sounded like a freight train. No error codes. I replaced the gear case and the inner drum (damaged original drum removing it). Just got everything back together and now receiving an error code F7E5, which points to a the gear case, clutch, slider, and electrical connections. I checked connections, reset the code and received it again after a calibration attempt. Could the new gear case be faulty? Or is this something else? Thank you.