my 92 drivers side power seat has a track that won't move. cleaned, greased, compared to the other side and nothing makes it go. the motor and all the attached equipment seem to work but the little gear that is supposed to move the large screw gear in the track itself just can't do it. anyone have a suggestion or know swapable seat tracks from other mid 90's fords? i have an extra set of seats in the garage but they are not 4 way power so they are no help for parts.