2006 Expidition brake issue

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jimmykid - 28 Jul 2008 21:22 GMT

I was drving home on an expressway last night and my car starting
making a clicking noise while going 70 miles an hour. The brake pedal
built up pressure until it became extremely stiff. Once I applied the
brakes the pressure let off and clicking noise stopped for around 3-4
mintues and then the process repeated itself over and over again until
I got home.

I had an issue earlier in the day where it felt like all 4 tires, for
a brief second, lost thier grip on the road. This happened twice and
also resulted in the stiff brake pedal.

I have a 2006 Expidition 4x4 with all the bells and whistles. So if
you have a question about "Do I have this option (traction control,
towing package, stabilty control, etc.)?" The answer will be yes.

I have eliminated some simple thigs to look at. The brake fluid level
is OK. There does not appear to be any brake leaks or fluid deposits
on the car or under the car. The pedal linkage is intact. The seal on
the master cylinder appears to be OK, and no warning lights (brake,
ABS, etc.) ever came on during the drive home last night which lasted
about 30 minutes.

Anybody have any idea what this could be?

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C. E. White - 28 Jul 2008 22:11 GMT

What do you mean the brake pedal became extremely stiff? Were you pressing
on the pedal while driving 70 mph? Or did the pedal become stiff while you
were pressing on the pedal to slow down? Is it repeatable?

I'd take it to the dealer immediately!

Ed

>I was drving home on an expressway last night and my car starting
> making a clicking noise while going 70 miles an hour. The brake pedal
[quoted text clipped - 19 lines]
>
> Anybody have any idea what this could be?

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jimmykid - 30 Jul 2008 22:22 GMT

sorry, i forgot to update this.

I took it to the dealer and found out I had a broken vacuum hose. I
did not know the auto 4WD and the locking hubs for the front tires are
run on vacuum, so (according to the dealer) as I lost vacuum in the
system the fornt hubs kept trying to engage (the clicking noise) and
the power brake booster loss power (the stiff pedal) but when I
stepped on the brake I somehow equalized the system, hence it all
stopped for a brief period. Vacuum hose is repaired and truck runs
great

> What do you mean the brake pedal became extremely stiff? Were
> you pressing
[quoted text clipped - 43 lines]
> >
> > Anybody have any idea what this could be?

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