My passenger tilt adjustment knob pulls out to where the tilt adjustment will not work. If I push it in slightly,the back hook catches the bottom and the back of the seat will tilt back and forth correctly. My driver side adjustment knob is not loose and works correctly. How do I fix the passenger knob? Note both seats were removed by the upholstery shop to stuff the seat bottoms. The World Upholstery leather was installed by the PO's shop right on top of the horsehair & springs--not very comfortable until after this repair. Thanks, Drew