My 1967 Cutlass supreme passenger window is only going down about 2 inches before it stops. It feels like it's getting stuck or binding on something. But I haven't been able to see where anything is getting caught. Any thoughts or insights would be greatly appreciated?

 

You will need to pull the door panel. There is a vertical rail that is also the vent window assembly vertical rail. It could have the guide weatherstrip bound up or coming apart and stopping you. There is a rear vertical guide as well and it could be causing that same issue. Both or those have a small amount of adjustment forward and back as well as in and out. I suspect it is the weatherstrip.

There is a lower stop at the center of the door towards the bottom but it only has about a quarter of an inch of adjustment so highly unlikely it is the issue.

 

Thanks! That was it. It was the rear vertical rail that had felt build up.

Thanks again

Rod