RIDE HEIGHT ADJUSTMENT
To perform the ride height check and adjustment requires the use of special slip plates under the front wheels. These plates allow the front suspension to properly settle by bypassing the tires adhesion to the ground.
1. Raise and support the vehicle. If equipped with ARC suspension, disconnect the front and rear air lines at the shock absorbers.
2. Position frictionless slip plates under the tires then lower the vehicle onto the slip plates.
3. Bounce the vehicles front and rear suspensions several times to normalize the vehicle static ride height.
4. Measure the distance between the center of the lower control arm bushing bolt and the ground. Record the measurement as dimension A.
5. Measure the distance between the lowest point of the steering knuckle (but not the ball joint) and the ground. Record the measurement as dimension B.
6. Subtract dimension B from dimension A for ride height.
7. For vehicles without ARC suspension, ride height should be 4.33-4.56 in. (110-116mm). (Service Manual actually says it could be as low as ~3.5" with "worn"/used components. 4.33-4.56in is for "new" components)
8. For vehicles with ARC suspension, ride height should be 3.26-3.50 in. (83-89mm).
9. To increase the ride height, raise the vehicle and tighten the torsion bar adjuster bolt. Recheck the ride height.
10. To decrease the ride height, raise the vehicle and loosen the torsion bar adjuster bolt. Recheck the ride height.
11. Once proper ride height is established, raise and support the vehicle.
12. If equipped with ARC suspension, connect the front and rear air lines at the shocks.
13. Remove the slip plates from under the wheels.
14. Lower the vehicle.
