On our 2001 Marquis the front slide out is drooping slightly, perhaps 3/8 of an inch in the rear and is noticeable when retracted and by the cabinet kick dragging slightly on the floor. The extending arm mechanism seems secure to the frame and slide out wall with no sign of wear on the rollers. The design of the arm attachment to the slide out wall almost precludes the possibility that it slipped there. The drop happened some time (years) ago and seems stable now.
My question concerns how the slide is supported. There are rollers that support the floor of the slide as it moves in and out. The rear roller seems sound and in place but I have to wonder if it has collapsed in some way. It is quite difficult to access for a good inspection.
What would you think about jacking up the slide out end, inserting and attaching a shim, perhaps a sheet of aluminum, between the floor and the rear roller for the full width that the roller rides on? If the rear roller is what is holding it up, that would seem to be a solution to my problem.