Durango 4WD V8-5.9L VIN Z (1998)
Measure rotor thickness at 6 to 12 points around the rotor face.
Position the micrometer approximately 25.4 mm (1 inch) from the rotor outer circumference for each measurement.
Thickness should not vary by more than 0.013 mm (0.0005 inch) from point-to-point on the rotor. Machine or replace the rotor if necessary.