Curb Height Adjustment/Correction

CURB HEIGHT CORRECTION
If the front and or rear curb height measurements do not meet the dimensions listed in the Curb Height Specifications, it may be due to improperly tightened suspension fasteners. If certain suspension component fasteners are tightened when the vehicle is not positioned at curb height, it can result in the curb height of the vehicle being too high or too low. In this case, a suspension bushing may be holding the vehicle up or down. Use the following procedure to verify this possibility.
1. Loosen the attaching bolts for the suspension components listed below:
Front:
- Front lower control arm pivot bolts
- Push rod to front lower control arm bolt.
- Front upper control arm cam bolt nuts Do not move adjustment cams.
- Front shock absorber to frame attaching bolts.
Rear:
- Rear lower control arm pivot bolts
- Rear shock absorber to lower control arm bushing bolt.
- Rear shock absorber to frame bolt.
- Rear trailing link to frame and knuckle attaching bolt.
- Rear lateral links to frame and knuckle attaching bolts.
2. Jounce the front and rear of the vehicle with the attaching bolts loosened to allow the bushings to relieve any torque remaining in the rubber and let the springs adjust the height of the vehicle. When jouncing the vehicle, the vehicle must be released at the bottom of the jounce cycle. This will ensure the vehicle's suspension will raise the vehicle to the correct curb height at the top of the jounce cycle.
3. Tighten all of the attaching bolts listed above that were loosened to the specified tightening torque.
4. Jounce the front and rear of the vehicle with the attaching bolts tightened to the specified torques. When jouncing the vehicle, the vehicle must be released at the bottom of the jounce cycle. This will ensure the vehicle's suspension will raise the vehicle to the correct curb height at the top of the jounce cycle.
5. Measure the curb height of the vehicle again to see if it is at the required curb height.
6. If the vehicle still does not meet the curb height specifications, inspect the following suspension components for conditions which may cause the vehicle to not meet the curb height specifications.
- Shock absorber assembly mounting bushings.
- Upper and lower control arm mounting bushings.
- Shock absorber springs.
- Frame damage to vehicle which affects mounting location of a suspension component.
- Front and rear sway bar.
- Inspect all suspension components for signs of damage which may have bent a component.
7. If the inspection does not determine why the vehicle is not meeting the front or rear curb height specification, the shock absorber springs should be replaced to correct the curb height of the vehicle. After replacing the springs on the shock absorbers, the vehicle must be at the correct curb height before tightening and torquing the shock absorber mounting bolts.