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Home >> GMC >> 1982 >> Magnavan Automatic Trans, Trans Mfr CD 400/M40 >> Repair and Diagnosis >> Brakes >> Brakes Control Systems >> Hydraulic System Control Valves >> Operation >> Metering Valve

Metering Valve

This valve holds off pressure to front disc brakes to allow rear drum brake shoes to overcome return spring pressure and make contact with rear drums. This prevents locking front brakes on slippery or icy surfaces under light braking conditions. Valve has no effect on front brake pressure during hard braking conditions.