The Drivers window was very stiff to roll up and down. When I stripped down the door and the took out the regulator I came to the conclusion it was inside the copper cup that is riveted to the mechanism. I drilled the rivets and took it off. Inside there is only 2 pieces. The splined gear that the crank handle bolts to, and a large spring. And it was this that was getting tripped in the copper cup as you turned the handle. So I put it on the only way I thought it would go as I have no reference, and put it all back together. Now it is free but a bit too free. The window can side down if you put your hands on it and pull down lightly, even going over bumps will cause it to come down. Anyone had this problem before?