I couldn't find anything previous about this subject, but hoping someone may have had to do this. My car is an S2 but guess this applies equally to all G cars.
The glass completely stopped moving just before Christmas. Assuming it was the motor, I took it apart - having then tested the motor with the glass removed, it worked fine (I have had it reconditioned anyway as it was out).
Having freed the glass (it was seized solid, no wonder the motor couldn't move it) it now moves freely at the lower part but then gets stiffer the higher it gets, and is now not locating within the frame as it reaches the top (I never noticed this before, I am guessing the door card may have compensated enough when in position for this to not be an issue).
Therefore, is it possible to either shim or adjust the angle of the window glass slider inside the door frame so I can get it running smoothly?
I would mention that the window frame had snapped when I got the car and has been re-welded, so it may not be at the absolute correct angle which may not be helping although I don't think its far out.
Also - whats everyone's thought on greasing the components - my pulley guides were greased but they seem to glide better without anything.