1987 Fifth Avenue - Power Window = Dead

1987 Chrysler Fifth Avenue with power windows and locks. Driver's Side rear window is inop. The motor runs, but the window stays stationary. I haven't yet pulled the door panel to inspect things.

Am I going to find the motor and regulator welded or riveted in, or can I remove it and hopefully replace plastic bushings in the regulator like one can do on older Ford vehicles?

Thanks,

-Stee