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Welcome. The height is not measured at the fenders, it is measured at special points.
Here is a full document that shows the measuring and specs.
Trim Height Inspection Z Height
Trim height is a predetermined measurement relating to vehicle ride height. Incorrect trim heights may cause symptoms similar to alignment problems. Check the trim heights when you diagnose steering or vibration complaints.
The Z dimension measurement determines the proper ride height for the front end. The Z dimension is different for RWD vehicles and S4WD or F4WD vehicles. The S4WD and F4WD vehicles have different points of measurement to determine Z height. Use the torsion bar adjusting arm in order to adjust Z height. RWD vehicles have no adjustment and could require replacement of suspension components.
On RWD vehicles, measure Z height from the center line of the bolt of the front lower control arm down to the lower inboard corner of the ball joint. Trim all Z heights at 89.0-101 mm (3.5-4.0 in).
On S4WD and F4WD vehicles, measure Z height from the center line of the pivot bolt (1) down to the lowest inboard edge of the steering knuckle (2).
For S4WD and F4WD vehicles, use the following measurements:
Measure the Z height using the following procedure:
Important: True trim height is the average of the high and low measurements.
The D dimension measurement determines the proper rear end ride height. There is no adjustment procedure. Repair may require replacement of suspension components.
Measure the D height using the following procedure: