1997 Ford f450 brakes self appling

Tiny
JARED RIGERT
  • MEMBER
  • 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.
Tuesday, April 19th, 2011 AT 3:57 PM

2 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
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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Tuesday, April 19th, 2011 AT 4:11 PM
Tiny
JARED RIGERT
  • MEMBER
  • 2 POSTS
Both are via rotor tempuratures. 8-900 degrees farenheit on both sides.
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Tuesday, April 19th, 2011 AT 7:15 PM

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