Power window too fast

[golfnickohio]

I recently rebuilt all four power windows on my 1965 Bird. They all work great now except the driver's side front widow seems to go up and down really fast. Actually, when it goes down it is almost like it is falling. Any ideas?

[TbirdIntender]

I've got no idea what's up (or down!) with this, but I do think it's the only case I've ever heard of where the window is too fast. All other window issues I can recall pertained to working too slow. So at least you have a distinctive problem.

[55Greg]

Is there a coiled spring in the regulator assembly? The spring is there to assist the window being raised. If it’s in backwards it could allow the window to go down too fast and makes the motor work harder to raise the glass.

[JoeBird]

I guess I’m reviving this old post. I have the same issue on my ‘65 and have had it for years. I’ve even replaced motors that failed and the new one did the same thing. One time on the opposite side, I was checking the window motor and connected it directly to a battery outside the car, and the window moved very fast, just like the other side. When I reconnected it through the car’s wiring, it operated normally.

So all this has me thinking this a voltage regulation problem. I haven’t dug any deeper because everything operates okay, and I had more urgent things to work on. But I probably need to get on it before it causes a whole new set of problems.

Any ideas?