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Message: <blockquote data-quote="AuroraGirl" data-source="post: 23114" data-attributes="member: 9417">the windows are largeCompare to a 1990s ford f150 with manual windows, the glass is square and about 1/2 the size , so its lot less weight and the curvature of the gmt800 glass is also greater, and the fit in the track is tighter. THe handles are more sloppy, this means the force used to spin them is not all raising or lowering, its getting wasted in binding and being sloppy. Polyurea grease is better for long term lubing the regulator and lower track area, a clear silicone would be best for the upper channels because it wont stain and wont stand out when it migrates out</blockquote>