Mazda window

[sparkola]

my power window on my 2000 B 4000 truck goes up and down just fine. But when it gets to the top it wont go up th elast 1/2 to 3/4 inch and just bounces around. If I pull it up all the way and wedge it with a rubber door closer and hit the down button the motor runs but it's like it is not grabbing the window. Any ideas?

 

[budwich]

teeth are probably gone on the regulator causing the motor to just "spin in space".