Vehicle window assembly with horizontal slider

A flush-flush horizontal vehicle window assembly (10) is provided that includes a sliding panel (20') with guide pins (22a-d), formed with a load-bearing shoulder (23a-c), and with a load-bearing shoulder surface (24a-d) on sliding panel corners, and a frame (14) defining a window opening (13). The frame is attached to two fixed panels (11, 12). Upper/lower tracks (15,16) are attached above/below the window opening. Each track has a leading (28a,b) and a trailing guide (29a,b) path formed through a surface of the respective tracks, where the pins partially project into the guide paths and where load-bearing shoulder surfaces (24a-d) smoothly and reliably slide on the track surfaces. Each leading guide patz (28a,b) is "S" shaped and each trailing guide path (29a,b) is shaped in a perpendicular manner at one end, which causes the sliding panel (20') to smoothly enter and seal the window opening in a flush manner. An aesthetically pleasing flush-flush slider results when the sliding panel is in the plane of the window opening and further in the plane of the outer vehicle body panel.