brake judder

[nick1]

Noticed that since it's first service, about a month ago ( could just be a coincidence) there was a slight judder under breaking at low speed ( town) felt through the break pedal. Today, I took it for a longer run and there is quite a significant judder when breaking from motorway speeds. There is no change in my driving style, quite gentle and no very hard breaking or sitting on the breaks. I'll get it booked back to Ford but just wonder if anyone else had experienced similar issues and how did it get resolve?

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[SteveS]

Hmm, I have noticed something similar. At lowish speeds the brakes would be a bit "grabby" but wasnt so noticeable at higher speeds. My passenger also was able to detect it on the last McMustang run but by the time we'd had a blast it appeared to have cleared.
I put it down to the car not getting much use over the winter months.

 

[Gibbo205]

That is just pad deposits.

Give the car a blast and a couple of big stops from high speed will clean any deposits from the disc.

 

[Bridgie]

Resurrecting an old thread.... With a similar question on my 2015 GT PP (Brembo's)

After winter replacing rotors and pads (Carbotech XP12 - Pre-bed) I am getting a judder at around 40mph when heavy braking from highway speeds. Which then disappears at stop.

I have ran the car hard, making a second bedding of the pads - No change
It has been driven normal round town, making no improvement.

Is it possible to get any air in the ABS system..? Faulty wheel sensor.? Worth a Vac of reservoir from the top.?

I am on track in 2 weeks and a little concerned with this issue. No Glazing or grooving on the rotors, not visible deposits either. They have gotten HOT during spirited driving, which should have cleared normal bed issues.
After multiple changes of pads and rotors and even full seal rebuild - I have never felt this..

Any Ideas, suggestions are welcome..!
Dave

 

[V8_MOTOR]

The obvious but did you clean the mating surface properly before fitting new rotors. Also, what rotors are you using?

Could just be bad rotors. Still have the old ones? Whack them on and see if the problem goes away. That's the only real sure way of trouble shooting.

I recently upgraded to a DBA floating fronts and orange pads setup with no issues.

 

[mike3105]

Have you got the tools or a local specialist to measure run out? Some discs are very sensitive to run-out, and it’ll cause the vibration you‘re talking about.

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