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anti-lock is growling on wife's car

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SD44
Senior Member


Joined: 09 Mar 2006
Posts: 562
Location: Mississippi
anti-lock is growling on wife's car

for some reason the anti-lock mechanism has started growling on my wife's 03 taurus. the brakes still work normal as always, but now as you're stopping the car the anti-lock starts growling right as it's about to stop. any ideas why it has started this? the noise is kind of embarassing, she said she hates pulling into work every morning, everybody stares as she's stopping. and you know how women are about things like that. Rolling Eyes
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Post Tue May 16, 2006 7:35 pm 
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SD44
Senior Member


Joined: 09 Mar 2006
Posts: 562
Location: Mississippi

no help on this, guys?? Crying or Very sad
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Post Thu May 18, 2006 7:28 pm 
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oldracer
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Joined: 13 Mar 2006
Posts: 77
Location: Wilhoit Az.

Check the growlers on the brake pads,they are supposed to make noise when the pads get worn.

Post Thu May 18, 2006 8:45 pm 
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SD44
Senior Member


Joined: 09 Mar 2006
Posts: 562
Location: Mississippi

you're not talking about the piece that makes your brakes squeal when they're almost worn out are you? this is definitely something with the anti-lock system.
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Post Thu May 18, 2006 10:25 pm 
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odd ball
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Joined: 13 Mar 2006
Posts: 100
Location: San Francisco, CA

sounds like a disc/pad problem. I can't think of any anti-lock parts that would make noise. ABS consists only of speed sensors on your axles, which hook to a computer, which controls a pump/valve assembly that is usually part of/ right after the master cyclender/ resevouir.

Is it the front or the back? Have you inspected the pad and disc for wear/warp/bad spots?

If the noise is coming from the wheels, it has to be a simple disc/pad problem. If it is coming from the pump and valve assembly under the hood, take it to the dealer. The pump/valve assembly should be doing nothing but letting fluid pass through it unless the ABS is activated, then it just pulses the valves. 99.9% of the time it is just sitting there.

My guess is that the pads are just oscillating at low speed. My car does this because I forgot to put on the isolating shims when I put in the last set of pads. It screams like crazy, a real head turner.

a small clip from a very long and boring Bosch Research paper on scanning laser Doppler vibrometer, and brake oscillation:
"Anybody who has ever spent time near a busy junction is only too familiar with how annoying the sound of squealing brakes can be. The noise actually begins just before the car comes to a stop, at walking speed."

In theory its the same principals as squeaky wiper blades. Vibration producing audibal sound. Your disc is vibrating and turning into a speaker! If the pads and discs are good, you can get disc brake anti sqeak at the auto parts store. It is like a tube of high temp rubbery stuff that you put on the back sides of the pad and it will isolate your pads from the piston and stop the vibration.
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Post Fri May 19, 2006 5:40 pm 
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