Rear brakes chatter when taking off, after stopping. Drum brakes. Like rear brakes not releasing. Is that the pistons seized up in the wheel cylinder bore? Or is it a proportioning valve problem? Goes away after you get moving. Pulled the drums off and everything looked normal. The drums weren't stuck either. A little background. Started after changing the brake booster. I used the tool to set the pin adjustment. I think I got it right. Thanks.
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