Remove motor of a GP30

[jleber7777]

Hi. I have acquired a HO Bachmann GP30 new in the box from 1990 (4 wheels per truck). When I first put in on the layout it had a clicking sound. So I am thinking some with the gears but I can't get the motor out of the frame to inspect the gears.
I have remove the 'motor retainer' still the motor will not leave the chassis. Any older railroaders out there who know the secret?

Jim