Savana 3500 V8-6.0L (2007)
Alignment: Testing and Inspection
Trim Height Inspection
Trim Height Measurements
Trim height is a predetermined measurement relating to vehicle ride height. Incorrect trim heights can cause bottoming out over bumps, damage to the
suspension components and symptoms similar to wheel alignment problems. Verify the trim heights when diagnosing suspension concerns and before
inspecting the wheel alignment.
Perform the following before measuring the trim heights:
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Ensure the vehicle is on a level surface, such as an alignment rack.
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Remove alignment rack floating plate pins.
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Set the tire pressures to specifications. Refer to Vehicle Certification, Tire Placard, Anti-Theft, and Service Parts ID Label .
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Inspect the fuel level. Add additional weight if necessary to simulate a full tank.
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To ensure proper weight distribution verify the rear storage compartment is empty.
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Close the doors and hood.
Z Height Measurement
The Z height measurement determines the proper ride height for the front end of the vehicle. Vehicles equipped with torsion bars use an adjusting arm to
adjust the Z height. Vehicles without torsion bars have no adjustment and could require replacement of suspension components.
Important: All dimensions are measured vertical to the ground. Trim heights should be within 12 mm (0.47 in) to be considered correct.
1. Place hand on the front bumper and jounce the front of the vehicle. Ensure that there is at least 38 mm (1.5 in) of movement while jouncing.
2. Allow the vehicle to settle into position.
3. Measure from the pivot bolt center line (2) down to the lower corner (5) of the steering knuckle (1) in order to obtain the Z height measurement
(4).
4. Repeat the jouncing operation 2 more times for a total of 3 times.
5. Use the highest and lowest measurements to calculate the average height.
6. The true Z height dimension number is the average of the highest and lowest measurements. Refer to Trim Height Specifications .
Z Height Adjustment