Vacume trouble? - Ford Powerstroke Diesel Forum
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Old 08-26-2012, 08:07 AM
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Vacume trouble?

I have a stock f350 drw the prob is my auto hubs don't work i can manually lock them and turn the switch and it works but i want it to work properly. Also the truck stops horribly hard pedal no stopping power. Was thinking it is the vacume pump any input?
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Old 08-27-2012, 07:18 PM
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There is a solenoid for the hubs that can go bad. That's the same problem I've had on mine. Switch only worked if I manually locked them.


Wishin I was fishin.
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Old 08-27-2012, 07:26 PM
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Could be the vacuum lines, vacuum actuator, or the hubs themselves. If the hubs...then they need to be replaced and that is a Dealer only part...at about $250-$300 each.

My first guess would be to check and make sure the vaccum hose is still connected and not damaged.
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Old 08-28-2012, 01:54 AM
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Thanks for the help
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Old 08-28-2012, 06:09 AM
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Before you replace them, take them apart and give them a good cleaning & greasing
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Old 08-28-2012, 06:56 AM
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Quote:
Originally Posted by NoRalPh View Post
Before you replace them, take them apart and give them a good cleaning & greasing
^^this.

Also, the brakes use the power steering pump pressure (hydroboost) to operate. they have nothing to do with the vacuum circuit.
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