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Home >> GMC >> 1966 >> I1500 Automatic Trans >> Repair and Diagnosis (Single Page) >> General Information >> Basic Trouble Shooting >> Hydraulic Brake Trouble Shooting >> Trouble Shooting Drum Brakes >> Brakes Chatter

Brakes Chatter

Improper shoe adjustment. Loose backing plate. Foreign material on lining. Weak or broken return spring. Loose wheel bearings. Drum out-of-round. Distorted or misaligned shoes. Frozen strut rod bushings.