US Federal law requires that the odometer in any replacement speedometer must register the same mileage as that on the removed speedometer. Begin by removing the instrument cluster, then take off the lens and mask from the instrument cluster. Gently push on the back of the speedometer to loosen it from the retainer clips in the cluster housing. Lift the gauges with a gentle rocking motion to separate them from the retainer prongs in the cluster housing. For installation, reverse the removal steps and apply a 3/16-inch diameter ball of silicone dielectric compound to the drive hole of the speedometer head before installing the cable.