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tibbetts29
10-16-2012, 04:49 PM
My 1998f150 is havin issues with the brakes, when I hit the brakes it will randomly lock the back brakes up, anybody know why?

fordrules
10-16-2012, 05:17 PM
Proportioning valve may be bad

http://maps.google.com/maps/api/staticmap?center=29.828903,-90.470126&zoom=14&markers=29.828903,-90.470126&size=400x300&sensor=true

tibbetts29
10-17-2012, 05:52 AM
Ok thanks that's what me and my dad were thinking

Raptor05121
10-18-2012, 10:54 AM
Both of them at the same time? I'm with the guy above on this.

tibbetts29
10-19-2012, 06:43 AM
Turns out my proportioning valve is good so wat could it be now

RhinoZ24
10-19-2012, 10:32 AM
Is it all the time, like everytime you hit the brakes? Do you have drum brakes on the rear by any chance?

Raptor05121
10-19-2012, 12:37 PM
Yes he has drums

tibbetts29
10-19-2012, 02:10 PM
It does it in the morning and at night

RhinoZ24
10-20-2012, 09:48 AM
And not during the day when it's warm, sounds like just drum brakes in general. When they get moisture in them they love to lock up, and at the worst of times.