Pay attention to what your doing...I didn't. i was installing my quarter window mechanism/hardware on my '67 dart 2 dr hardtop today. I did the driver side, it went swimmingly... I put the glass/roller bracket assembly in first, then the window crank mechanism, installed the rollers into the appropriate slots, then installed the two guide rails. When I got to the passenger side, I asked my self...hmm, did I install the guide rails before the crank mechanism or after? Boy, it makes a huge difference. I ended up trying to install the guide rails first and then the crank mechanism and the passenger side was extremely hard, compared to the driver side. I ended up pulling the guide rails and redoing it. Amazing how one forgets what one did just an hour earlier....anyway, they're both in, working and ready for fine adjustments, once I get the door glass/mechanisms in....I'll make sure to pay attention to what I do for those....

Brian

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https://tinyurl.com/yynpj4v2

The passenger side rear 1/4 window had a broken roller on the 68 Barracuda. I was able to find a replacement, and got it swapped out.
I was truly amazed at the hardware required simply to mechanically move a window up and down.
Like you, even though I took it apart it took several gazes at the FSM and the intact driver side mechanism to get it back in place.

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

I think it was really right hand vs left hand. When I did the driver side it went so easily, but I think my right hand was doing most of the work/supporting. On the passenger side it was my left (i'm right handed). I know it shouldn't make any difference, and I knew where all the pieces went, still I struggled with something that I'd had literally just completed easily on the other side.

I redid all the hardware, new rollers, refurbished the ones you can't buy any longer. The steel clips that the rollers ride on were bad, so I used some SS repair track for sliding doors and expoxied them on. Works really smoothly even without grease, with the grease it's nearly effortless to roll them up and down.

b

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https://tinyurl.com/yynpj4v2