Your discription is lacking.
The window has a pice of metal bolted on to it at the bottom. This piece of metal has a circular center with a plstic (white) bushings inside of it. There is a metal shaft (taht is part of the door frame) that the afformentioned bushings slides on.
these do wear out, and the shaft does require greasing every few years.
There is a also a metal "tab" with a felt covering that guides the window as is comes down into the door. This too should prevent ratteling when the window it down.
hope that helps. sorry no pictures.
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71' 3880# with me. Big Block 402, Merlin oval heads, 10.2:1CR, TH400, 3.73 posi,
1/8th: 8.0 @ 88mph
1/4: 12.5 @109mph w/ 1.89 sixty foot (street tires)
Picture of me roasting the tires and other guy stuff
My other site, picture oriented
-Heart of Dixie Chevelle Club
www.chevelle-ss.com