Noise, Chatter, Or Pulsation

Excessive disc runout. Disc pads or disc out of parallel (thickness varies). Shoe and lining knockback after violent cornering (pump pedal to correct). Excessive clearance between disc pad and caliper. Anti-rattle retainer missing or out of position. Disc pad rubbing caliper housing. Caliper binding on mounting bolts. High-frequency chatter of pads against disc. Rear drums out-of-round. Wheel bearings loose. Improper wheel nut tightening. Caliper mounting bolts too long.