I have a 1989 sc 5 spd. My power window motor wont let window up or down. But it runs. I cleaned and Lubricated the parts, Took motor out and freed window loose. How loose does the Window have to be with motor out. Does the window have to be loose enough to drop down on its own? I can now push and pull the window up and down with a Little effort. But when I put motor in, It wont move the Glass. Without my helping it. The motor runs BUT Can it be to weak??