Torsion Bar: Service and Repair

Special Service Tool(s)

Removal

1. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension vehicle. This can be accomplished by turning off the air suspension switch located in the rear jack storage area. Failure to do so can result in unexpected inflation or deflation of the air springs or shocks, which can result in shifting of the vehicle during these operations.

Raise the vehicle on a hoist.





2. Remove the torsion bar cover plate.
1 Remove the torsion bar cover plate bolts.
2 Remove the torsion bar cover plate.





3. Note: Before relieving the torsion bar tension, measure and record the measurement of the torsion bar adjustment bolt. This measurement will be used as the preset depth for the new torsion bar adjustment bolt during installation.

Make preliminary adjustment.
^ Measure and record the length where indicated.





4. Relieve the torsion bar tension.
1 Position the Torsion Bar Tool and adapters.
2 Tighten the Torsion Bar Tool until the torsion bar adjuster lifts off the adjustment bolt.





5. CAUTION: The torsion bar adjustment bolt is coated with: dry adhesive; and must be replaced if it is backed offer removed. Failure to do so can cause the adjustment bolt to loosen during operation and cause a loss of vehicle alignment.

Remove the torsion bar adjustment bolt and nut.





6. Loosen the Torsion Bar Tool until the tension is removed from the torsion bar.





7. Remove the torsion bar.
1 Mark the torsion bar and the adjuster for proper installation.
2 Remove the torsion bar insulator.
3 Grasp the torsion bar, and pull it free from the front suspension lower arm.

Installation





1. Position the torsion bar and the torsion bar adjuster.





2. Install the torsion bar adjuster.
1 Align the marks on the torsion bar and the torsion bar adjuster, then install the torsion bar adjuster.
2 Position the torsion bar insulator.





3. CAUTION: The torsion bar adjustment bolt is coated with: dry adhesive; and must be replaced if it is backed off or removed. Failure to do so can cause the adjustment bolt to loosen during operation and cause a loss of vehicle alignment.

Preload the torsion bar.
1 Install the Torsion Bar Tool and the adapters.
2 Tighten the Torsion Bar Tool until the new adjustment bolt and nut can be installed.
3 Turn the adjustment bolt until the preliminary adjustment measurement (recorded length of the old adjustment bolt) is reached.





4. Install the torsion bar cover plate.
1 Position the torsion bar cover plate.
2 Install the torsion bar cover plate bolts.

5. Note: If equipped with air suspension, reactivate the system by turning on the air suspension switch.

Lower the vehicle.
6. Adjust the ride height.
7. Check the alignment.