I have a 1997 FZJ-80 and the passenger seat is not moving back or forward. The Front Horizontal Jack Screw RH is moving but Front Seat Horizontal Jack Screw LH is not moving. The motor is working fine and the drive cable is turning. Should I start with replacing the Front Seat Slide Housing? As I am writing this, I am thinking that I should just replace all the gear while im at it. Your feedback would be appreciated