driver seat travel

[Jvan]

I'm having a problem moving the driver's power seat to the rear most postion. It will move forward, tilt, back rest will move forward & back but the seat bottom doesn't move as far towards the back seat as it normaly did. This makes it difficult for my wife( who is short) to get into and out of the car, since she needs to position the seat as close to the steering wheel as possible. I've checked for an obstruction under the seat and in the tracks but found nothing that would prevent the seat from traveling to the rear most position. Any suggestions?