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Home >> Chevrolet >> 1971 >> Chevelle Greenbrier, Not Available, 5.7L Eng >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Hydraulic Brake Trouble Shooting >> Trouble Shooting Drum Brakes >> Spongy Pedal

Spongy Pedal

Air in system. Improper brake fluid. Improper lining thickness or location. Drums worn too thin. Master cylinder vent clogged.