window problems
Your car may be different, but I just fixed the very same problem on my '91. I kept thinking that the in-out adjustment (12 mm. nut near top of door) was off. I got it so the window ran OK, but when I reassembled the door it started dragging again.
It turned out that the guide at the rear of the door was pinching the edge of the glass. On my car, the bracket for this guide attaches with a bolt (12 mm. head) near the rear of the door. It can move sideways about 1/2 inch. Pull off the inner glass seal to see all this better.
I slid the bolt and guide forward against the glass, then backed it away maybe 1/8 inch and tightened it. Bingo! For good measure, I used silicone spray all around the door gasket where the top and sides of the glass fit. Fast as new.