[Varmit]

The Smith's speedo has a problem with the little reset dial for the trip odo. When I try to reset the trip odo to zero it just spins, so I am assuming the plastic gears are either worn or stripped. I see there is a small retaining nut on the bottom of the dash with the adjustment knob. Can this mechanism come our and be replaced without pulling the entire speedo? And can this be replaced without a new speedo?