Wheel Alignment Information

Front and rear wheel alignment involves the correct positioning of the tire contact patch in relation to the pavement. This involves correct adjustment on positioning of all the interrelated suspension angles and linear distances such as caster, camber, wheel toe and front and rear toe pattern. An alignment is considered essential for efficient steering, good directional stability and to prevent abnormal tire wear.

NOTE: Routine inspection of front and rear suspension and steering components is a good preventative maintenance practice. Inspection also helps to ensure safe operation of the vehicle.

The method of measuring front and rear wheel alignment will vary depending on the type of alignment equipment being used. The instructions provided by the manufacturer of the equipment should always be followed. The exception is that alignment specifications contained in this manual (or a subsequent service bulletin) should always have precedence.

There are 7 suspension system and steering linkage measurements that are used to determine if the front and rear wheel alignment is correct.

All suspension angles and linear distances are mechanically adjustable, except steering axis inclination and wheel toe out on turns. Although not adjustable, these measurements are valuable in determining if there are bent or damaged components are involved.

NOTE: The Viper suspension geometry is such that the vehicle suspension and alignment settings change rapidly as the vehicle changes height. For this reason it is extremely important that all suspension specifications be checked and adjusted with the vehicle at the correct height. If alignment specifications are required to be checked with a vehicle at curb height, the fuel tank must be full, fluids at correct fill level and all factory supplied equipment (top, removable windows, spare tire etc.) must be in the vehicle. This will put the vehicle at the correct weight which its curb height is to be measured at. If specifications are to be checked at vehicle design height, height checking fixtures must be used and vehicle ballasted and/or jacked to the specified design height.

NOTE: The front and rear vehicle curb height must be measured and adjusted before any other alignment measurement/adjustment is initiated. See Vehicle Height Adjustment Procedures for proper height checking and adjustment procedures.

The measurements and adjustments should be made in the following sequence.

CAUTION: Do not attempt to modify any suspension or steering component by heating and bending.