Pulsation

Brake pulsation concerns may result from two basic conditions:

1. Thickness variation.

2. Excessive corrosion.

Rotor thickness variation is the result of uneven rotor wear caused by excessive lateral runout (>0.076 mm; >0.003 in.). Lateral runout can be induced by:

1. Distortion of the braking surface by applying uneven and/or excessive wheel nut torque.

(This could be the result of a recent tire change, rotation, etc.).

2. Improperly refacing rotors.