of the seat position with the sensor or shunt 42 located inside of the slide rail foreign objects may be prevented from entering the seat position sensor thereby improving the accuracy of detection of the full forward seat position and limiting the affects of foreign objects and dirt and dust since the sensor is set on the top surface of the upper rail the seat position sensor 38 and shunt plate 42 design provide greater flexibility in design for the vehicle seat in an exemplary embodiment as illustrated in fig1 and 12 an annular ring or spacer 46 may be located between the lead screw bracket 48 and transmission mounting bracket 32 spacer 46 may function as a stopping member to minimize the force felt by the occupant when the track assembly comes to a stop spacer 46 may be comprised of any non metallic resilient flexible material such as acetal pom copoly acetal pom copolymer plastic material available as celcon u2122 m90 available from ticona company in florence ky usa for purposes of this disclosure the term u201c coupled u201d means the joining of two components electrical or mechanical directly or indirectly to one another such joining may be stationary in nature or movable in nature such joining may be achieved with the two components electrical or mechanical and any additional intermediate members being integrally formed as.