Mechanics

F450 BRAKES SELF APPLING

1997 Ford F-450 • 4WD Automatic • 184,256 miles

We have a 1997 Ford f450 4x4 the the front brakes will gradually and randomly apply wjile driving down the road. Have replaced master cylinder and the hydro booster and the problem still exists.
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Jared Rigert
April 19, 2011.




Have you confirmed whether it's both wheels equally or maybe just one wheel?
When it happens again, crack the master cylinder lines open momentarily and see if the brakes release.
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Wrenchtech
Apr 19, 2011.
Both are via rotor tempuratures. 8-900 degrees farenheit on both sides.

Tiny
Jared Rigert
Apr 19, 2011.

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