F 450 4WD Super Duty V10-6.8L VIN D (2004)
Raise and support the vehicle frame until the weight is off the rear springs but with the tires still touching the floor.
2. Support the axle.
3. Remove and discard the four nuts and two U-bolts to allow the rear axle to separate from the rear spring.
4. Turn the shim so the recess is facing upward.
5. Insert the shim between the rear spring and the spring seat.
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Position the shim so the tie bolt through the spring leaves is in the shim recess, the stud on the bottom of the shim is in the spring seat recess,
and the shim is aligned with the rear spring.
