tcarroll

I have a 1968 Cutlass 2 Door Post, I have put new window felts and window channel felt in the back quarter windows. I am able to wind the window down with the hand crank after installation but the window will not go back up. It wants to grab the window channel felt and bunch it up. I have used a lot of silicone sparay and it has helped but not solved the problem. If I take the channel felt out of the vertical post channel the window goes up and down so it is obviously to tight but there is no adjustment for this that I can see. Do I need different or special channel felt for my 1968 Cutlass post?
Any help is appreciated.....Todd