RAM 2500 Truck 2WD L6-359 5.9L DSL Turbo VIN D FI (1997)
Brake Rotor/Disc: Testing and Inspection
Brake Chatter Checks
The most common cause of brake chatter, vibration or pedal pulsations on disc brakes is a variation in thickness of the disc.
Excessive lateral runout of braking disc may cause a "knocking back" of the pistons, possibly creating increased pedal travel and vibration when
brakes are applied.