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Old 08 August 2018, 11:00 PM   #1  
flossy1903
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Default Brake judder

Recently got a 2014 Sti with only 10k after a month got a front brake judder as steering wheel vibrates under heavy braking, had discs skimmed and its come back, everything nice and clean, had same problem with previous 2011 Sti it needed a front near side wheel bearing as had a run out on hub, also lots of brake dust on wheels anyone else getting brake shudder problems??

Many thanks

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Old 09 August 2018, 09:40 AM   #2  
ST-X
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Knackered bush? I've had brake judder and shake before which I eventually tracked back to a worn front LCA bush that was massively exacerbating a tiny amount of judder at the pedal but I've also had it when the brakes have been absolutely fine once the bush was replaced.
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Old 11 August 2018, 09:19 PM   #3  
big keith
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think you would be better buying new discs .have you checked the run out with a dial gauge should be know more than 003 thou.Also are the discs genuine Subaru or cheap chinese crap.

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Old 13 August 2018, 09:51 PM   #4  
flossy1903
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Had brake discs skimmed it was fine for about a month then started juddering again, car has only down 12,000 miles
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Old 14 August 2018, 12:37 PM   #5  
alcazar
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Tell us what calipers, discs and pads are fitted?

Brake judder is almost always down to deposits on the disc, rather than discs being warped.
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Old 14 August 2018, 04:51 PM   #6  
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I have a similar problem so will be interested in the outcome.
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Old 14 August 2018, 10:49 PM   #7  
flossy1903
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Standard discs and pads fitted.
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Old 15 August 2018, 01:49 PM   #8  
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I had this problem , and found I was warping the disks , even the new ones I put on. I found two issues.

1. The Calliper's were seizing due to corrosion on the pistons , which I cleaned up I replaced the discs at the same time and things were fine no more vibration / shudder.

2. About two weeks later it happened again, after pulling off from the motorway and standing on a slight hill with my foot on the pedal. I know this is not a good idea , but I was only doing 80 to zero once.

So this time I replaced the cheapy discs with some standard ones from TRW which seem to be well tempered and reliable for a normal WRX driver.

I should note that I don't use these discs all the time , but only put them on a for a week or so before the TÜV and take them off as soon as I can afterwards. I use a twin Hat type , a disc that floats on a hub , its a big brake conversion from Godspeed. The car now runs well over 300bhp so I would be in trouble if I used the standard discs.
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