Curb Height Measurement

NOTE: The Viper front and rear wheel alignment must be checked and or adjusted to the preferred specifications, with the vehicle at CURB HEIGHT rather than at DESIGN HEIGHT.

1. Correctly position the vehicle on alignment equipment per the alignment equipment manufacturer's recommendations.
2. Perform Pre-Alignment Inspection. Check that all tires are at the preferred inflation pressure and adjust as necessary if they are not.

NOTE: When the front and rear height checking fixture is installed on the wheels, they must be positioned at the very bottom of the wheel inner flange. This is required to ensure the height checking fixtures are parallel to the bottom surface of the frame rails, which is required to achieve an accurate vehicle curb height measurement.





3. Install the front and rear Vehicle Height Checking Fixtures, Special Tools 6914 or equivalent, on the inner rim flange of the front and rear wheels and measure vehicle curb height.

NOTE: If vehicle is within required curb height specification, proceed to step Step 4 of this procedure.

NOTE: If the vehicle is not within the required curb height specification range, do not perform a front or rear wheel alignment procedure at this time. The vehicle MUST be within the required curb height specification to obtain an accurate wheel alignment.
Vehicle curb height on the Viper can be extremely affected if all rubber bushings used in the vehicles suspension are not tightened and torqued with vehicle at specified design height. This is due to the extreme stiffness of the rubber bushings used in the vehicle's suspension components. This will ensure all bushings are tightened and torqued to specifications, with the vehicle set to its specified design height. Then, recheck vehicle curb height to verify it is within specification, before performing vehicle alignment procedure.





4. Attach alignment equipment heads onto the vehicle wheels. The Viper uses flangeless style wheels, thus any alignment equipment used must be capable of attaching to outside edge of wheel rim lip.
5. Proceed with camber and caster angle adjustments.