I took off the casing to the motor and found that as the gearing went around it was too loose. I can't remember how I did it exactly except to say that I drilled some holes and put some screws through in such a way as to apply pressure to the loose piece. It performed well and has held up to date.

I think your best bet is to take off the rear cover to the tailgate and take the cover off the motor and inspect.

Hope this helps

Don

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