Vehicular rear slider window assembly with retaining element

1. A vehicular rear slider window assembly comprising:

a fixed window panel comprising an inner side and an outer side;

an upper rail and a lower rail attached at the inner side of the fixed window panel;

wherein the lower rail comprises a U-shaped rail having a channel with (i) a first leg along one side of the channel and having a first attaching surface that attaches at the inner side of the fixed window panel and (ii) a second leg along the other side of the channel and spaced from the first leg and having a second attaching surface that is opposite from the first attaching surface and separated from the first attaching surface by a thickness of the lower rail;

a movable window panel having a lower perimeter edge received in the channel of the lower rail and an upper perimeter edge received in a channel of the upper rail;

wherein the movable window panel is movable along the upper rail and the lower rail between a closed position, where the movable window panel is positioned at an opening of the fixed window panel, and an opened position, where the movable window panel is moved at least partially away from the opening;

a retaining element attached along the lower rail and at the second attaching surface of the lower rail; and

wherein the retaining element includes an attaching portion that attaches at the second attaching surface of the lower rail and a retaining portion that extends from the attaching portion and at least partially across the channel of the lower rail between the attaching portion and an inner side of the movable window panel to limit vertical movement of the movable window panel relative to the upper and lower rails.

2. The vehicular rear slider window assembly of claim 1 , wherein the retaining element is attached at the second attaching surface of the lower rail after the movable window panel is received in the channels of the upper and lower rails.

3. The vehicular rear slider window assembly of claim 1 , wherein the retaining portion of the retaining element engages an inner surface of the movable window panel.

4. The vehicular rear slider window assembly of claim 1 , wherein the movable window panel has a carrier element disposed along a lower perimeter region of the movable window panel, and wherein the carrier element is movably disposed in the channel of the lower rail, and wherein the retaining portion of the retaining element limits upward movement of the carrier element relative to the lower rail to limit dislodging of the movable window panel from the lower rail.

5. The vehicular rear slider window assembly of claim 1 , further comprising an upper retaining element attached along the upper rail, wherein the upper retaining element includes an upper attaching portion that attaches at a second attaching surface of the upper rail and an upper retaining portion that extends at least partially across the channel of the upper rail to limit vertical movement of the movable window panel relative to the upper rail.

6. The vehicular rear slider window assembly of claim 5 , wherein the upper retaining element is attached at the second attaching surface of the upper rail after the movable window panel is received in the channels of the upper and lower rails so as to be positioned above an upper edge of the movable window panel to limit vertical movement of the movable window panel relative to the upper rail.

7. The vehicular rear slider window assembly of claim 5 , wherein the upper retaining element is attached at a notched region of the upper rail.

8. The vehicular rear slider window assembly of claim 5 , wherein the upper retaining portion extends across the channel of the upper rail above the upper perimeter edge of the movable window panel to limit upward movement of the movable window panel relative to the upper rail.

9. The vehicular rear slider window assembly of claim 1 , wherein the fixed window panel comprises a single fixed window panel having the opening, and wherein the upper rail is attached above the opening and the lower rail is attached below the opening.

10. The vehicular rear slider window assembly of claim 1 , wherein the fixed window panel comprises a pair of spaced apart fixed window panels, and wherein an upper trim panel is disposed between the pair of spaced apart fixed window panels above the opening and a lower trim panel is disposed between the pair of spaced apart fixed window panels below the opening, and wherein the upper rail is attached at an inner side of the upper trim panel and the lower rail is attached at an inner side of the lower trim panel.

11. The vehicular rear slider window assembly of claim 1 , wherein the vehicular rear slider window assembly is configured to be disposed at a rear portion of a cabin of a pickup truck.

12. The vehicular rear slider window assembly of claim 1 , wherein the vehicular rear slider window assembly is configured to be disposed at a rear portion of a cabin of a vehicle, and wherein, with the vehicular rear slider window assembly disposed at the rear portion of the cabin of the vehicle, the inner side of the fixed window panel is toward the cabin of the vehicle and the outer side of the fixed window panel is exterior of the vehicle.

13. The vehicular rear slider window assembly of claim 1 , wherein a flexible seal is disposed in the channel of the upper rail, and wherein the flexible seal, when the upper perimeter edge of the movable window panel is received in the channel of the upper rail, flexes to allow the movable window panel to be inserted into the channel of the upper rail.

14. A vehicular rear slider window assembly comprising:

a fixed window panel comprising an inner side and an outer side;

an upper rail and a lower rail attached at the inner side of the fixed window panel;

wherein the upper rail comprises a U-shaped rail having a channel with (i) a first leg along one side of the channel and having a first attaching surface that attaches at the inner side of the fixed window panel and (ii) a second leg along the other side of the channel and spaced from the first leg and having a second attaching surface that is opposite from the first attaching surface and separated from the first attaching surface by a thickness of the upper rail;

a movable window panel having a lower perimeter edge received in a channel of the lower rail and an upper perimeter edge received in a channel of the upper rail;

wherein the movable window panel is movable along the upper rail and the lower rail between a closed position, where the movable window panel is positioned at an opening of the fixed window panel, and an opened position, where the movable window panel is moved at least partially away from the opening;

wherein the movable window panel has a carrier element disposed along a lower perimeter region of the movable window panel, and wherein the carrier element is movably disposed in the channel of the lower rail;

a retaining element attached along the upper rail and at the second attaching surface of the upper rail; and

wherein the retaining element includes an attaching portion that attaches at the second attaching surface of the upper rail and a retaining portion that extends from the attaching portion and at least partially across the channel of the upper rail between the attaching portion and an inner side of the movable window panel to limit vertical movement of the movable window panel relative to the upper and lower rails.

15. The vehicular rear slider window assembly of claim 14 , further comprising a lower retaining element attached along the lower rail, wherein the lower retaining element includes a lower attaching portion that attaches at a second attaching surface of the lower rail and a lower retaining portion that extends at least partially across the channel of the lower rail to limit upward movement of the carrier element relative to the lower rail to limit dislodging of the movable window panel from the lower rail.

16. The vehicular rear slider window assembly of claim 14 , wherein the retaining element is attached at a notched region of the upper rail.

17. The vehicular rear slider window assembly of claim 14 , wherein the retaining portion extends across the channel of the upper rail above the upper perimeter edge of the movable window panel to limit upward movement of the movable window panel relative to the upper rail.

18. The vehicular rear slider window assembly of claim 14 , wherein the vehicular rear slider window assembly is configured to be disposed at a rear portion of a cabin of a pickup truck, and wherein, with the vehicular rear slider window assembly disposed at the rear portion of the cabin of the pickup truck, the inner side of the fixed window panel is toward the cabin of the pickup truck and the outer side of the fixed window panel is exterior of the pickup truck.