exact thing just happen to me. u need to stop bringin the window down before it wont go back up like it happen to me on friday night. is not the motor, is the cable that is starting to brake inside the motor kit and thats why it goes up slow until it wont go up at all. if i were u i would open the door and take out the regulator and motor kit and look and see if the cable is breaking, if is get the one from autozone lifetime waranty.