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Old 09-16-2017, 07:26 PM   #10
RodnRudy
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Join Date: Oct 2014
Location: New Palestine In
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Re: Brake help - what am I missing?

Yes a bad brake booster can cause a hard pedal. If it is not getting enough vacuum the pedal will be hard and not hold the truck in gear. Check to make sure your booster check valve is working properly. You should have at least 17" of vacuum for the booster to work properly.
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