Glad this helped. Thanks for the washer sourcing tip. I recall some earlier posts about GP7 gear sounds. Maybe related to this. One post I think said those 2 screws in theirs were only 3/16" long (ought to be 20mm)? Not sure in that case how the motor ever even stayed put.
Click here for AF FC Baldwin parts --
Click here for AF FC GP7 parts --
The screw used to secure the motor to the top of the motor mount or base plate is the same in both -- see photo attached. Not sure about the screw used to hold the motor mount or base plate to the top of the truck - 2 in each truck as well. Might be the same one.
SCREW / 2.5 mm x 20 mm x .45 thd
Dave