Trim Height Inspection

Trim Height Adjustment

- Tools Required
- J 42854 Trim Height Measurement Gauge

Important: When adjusting either the right or left rear trim height the opposite side trim height will be effected.

Trim height should be measured with a full tank of gas and zero passengers or cargo.
An alignment hoist should be checked periodically to assure that both runners are the same height off the ground, side-to-side and front-to-rear.





1. Place the vehicle on an alignment rack.
2. Set the tire air pressure to the proper pressure.
3. Manually lift the rear of the vehicle up approximately 38 mm (1/2 inch), gently remove hands and let the vehicle settle.
4. Repeat the above step two more times for a total of three times.





5. Use J 42854 to measure the distance between the lowest point of the ball joint (2) and the center of the front side of the lower control arm mounting bolt (1).
6. Manually push the rear of the vehicle down approximately 38 mm (1/2 inch), gently remove hands and let the vehicle settle.
7. Repeat the above step two more times for a total of three times.
- Measure both the right and left sides of the vehicle.
- The true D trim height is the average of the high and low measurements.
Refer to Trim Height Specifications in Suspension General Diagnosis.

Important: One complete turn of the adjustment bolt is equal to 2 mm (5/64 inch).





8. Remove the retainers (1) on the top of the spring bolts (2).
9. Adjust the D trim height by turning the spring bolt.

Notice: Refer to Fastener Notice in Service Precautions.

10. Perform the jounce procedures again and measure the D trim height.

Important: Do not exceed the maximum difference between the right and left rear spring stud heights.





11. Measure the rear spring stud heights (1), the maximum difference should be 5 mm (0.196 inch).
12. Install the retainers to the bolts.
13. Lower the vehicle.