Tonight I put the driver's-side door window back in my '68, and all is not well--unlike the passenger side installation, which went off without a hitch. I'm using the original glass, tracks, sashes..etc. The only non-original items are the window mounting plates w/rollers and the regulator.
When I bolted the glass to the regulator I had to push the sash out onto the window studs, and the glass is very hard to roll up and down and binds severely in the tracks. During the middle half of it's travel it cocks in hard against the inside fuzzy guides for no apparent reason. I tried every adjustment to make, and nothing made any difference. I compared the new repro regulator and window mount plates against the originals, and they appear indentical. I have virtually no experience with windows other than the other 3 which went back in perfectly. Could the repro regulator be the culprit, or am I just overlooking something simple? Any help would be greatly appreciated. Thanks.