Question about 1992 Chevrolet S-10

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Rear brakes wont apply consistantly

When applying brakes, the front wheels will lock up and rear brakes will apply only after almost coming to a complete stop. they seem to be appling but limited, but not right away. After several repeated attemps on ice, the rears apply hard with a shudder after a few seconds in apply mode. The rear brakes were replaced with new shoes and drums. old shoes were about half worn. there is no fault lights or code. the truck has 53,000 miles and the old shoes and drums were original

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BAD proportion valve.

Posted on Jan 08, 2009

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1- brake system low on fluid,
2- improperly bled (air in lines).
3- Master cylinder (applies equal pressure to all 4 cylinders) is bad.

Posted on Jan 08, 2009

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