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I disconnected the window, and used the contro;s to move the regulator up and down. It still made the noise. I don't think it's possible for part of the regulator to come out of the track. The inside of the rail is to thick for that. The regulator did have more play when it was free of the window, so I rocked it and felt behind it and around the wheels, and I couldn't find a problem. I sprayed more silicone spray. I also squirted some engine oil on the top wheel from the access at the top of the rail, thinking a little more viscosity might help. Do you think it could just need an even more viscous lubricant, like some kind of grease? Maybe the WD-40 and the silicone spray is just disovling what little grease is left on the rail. I can see from some of the photos in this thread, that a thick, clear grease is supposed to be on the rail. What type of grease would be best to use? My dad has a gease gun with some sort of red grease in it, but maybe I need to get another kind. I'm guessing I won't be able to avoid removing the mechanism from the door to grease it.
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