We recently repaired the driver side window on our 1966 Mustang, at first it seemed that the plastic window bushing was broken, or it had come off the track. It turned out that the problem was that on the window regulator (part number 23234) the triangle part broke off from the scissor arms. Apparently this is not a typical window problem but we were able to get ourselves a used window scissor regulator for $20, along with three new window bushings. A new window regulator goes for about $30 on the web. Installation is really pretty easy, as long as you do not bolt up the triangle part (three ½ inch bolts) before you place the three tracks in place with the bushings on them. Take off the interior door cover. Position the part inside the door and orient it properly. Place each bushing arm in the proper track and then move the triangle to the correct position and bolt it up. It is also easier to have someone hold the window while you are doing this. Or you can jam the window with a screw driver wrapped with a cloth. (click to enlarge) (click to enlarge)
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