Nissan Forum - Nissan Enthusiast Forums - Front seat moves only on left side

I have a 2001 Pathy with a malfunctioning front driver seat. The forward/reverse seat movement is not working properly. The right rail drive functions, but the left rail drive does not, so when I try to move the seat forward, theright side of the seat moves forward a bit and then stops because theleft side is not moving. I pulled the seat out to look for the obvious, i.e. coin or golf tee blocking it. No blockages found either rail, i.e. they move freely when I disconnect the rails from their connections to the drive screws. This is where things are a bit more puzzling. I removed the electric motor. There is a spindle from the motor that drives the right screw drive, and this is working, so I know the motor is turning. However, the motor is not turning the left screw drive. Is this a connection problem within the left spindle housing? Can I replace this part without replacing the entire seat? Any suggestions are appreciated.