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Old 03-04-2014, 08:47 PM   #1
Redace21
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Member#: 368954
Join Date: Sep 2013
Default 07 WRX Shaking

When I'm braking from about 75+ mph, especially after driving for a while, the steering wheel shudders violently, I noticed this after spirited driving on Three Sisters.
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Old 03-04-2014, 08:52 PM   #2
Scoobiesdoobies
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Member#: 321546
Join Date: May 2012
Chapter/Region: BAIC
Location: Santa Cruz, Ca
Vehicle:
2006 Wrx Limited
OBP

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Quote:
Originally Posted by Redace21 View Post
When I'm braking from about 75+ mph, especially after driving for a while, the steering wheel shudders violently, I noticed this after spirited driving on Three Sisters.
Rotors are warped. Replace with centric premiums and get new pads while ur at it. Posiquiets work great for wrx's.
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Old 03-04-2014, 10:15 PM   #3
Dmochowski
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Member#: 306478
Join Date: Jan 2012
Chapter/Region: South East
Location: chattanooga, TN
Vehicle:
2012 WRX limited
305whp/360tq TSM tuned

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most likely that, but in the meantime try re-bed in the brakes see if that helps

from stoptech
Quote:
Note the emphasis on the word even, as uneven pad deposits on the rotor face are the number one, and almost exclusive cause of brake judder or vibration.
and since i was on the page.
Quote:
Bedding-in Street Performance Pads
For a typical performance brake system using street-performance pads, a series of ten partial braking events, from 60mph down to 10mph, will typically raise the temperature of the brake components sufficiently to be considered one bed-in set. Each of the ten partial braking events should achieve moderate-to-high deceleration (about 80 to 90% of the deceleration required to lock up the brakes and/or to engage the ABS), and they should be made one after the other, without allowing the brakes to cool in between.
Depending on the make-up of the pad material, the brake friction will seem to gain slightly in performance, and will then lose or fade somewhat by around the fifth stop (also about the time that a friction smell will be detectable in the passenger compartment). This does not indicate that the brakes are bedded-in. This phenomenon is known as a green fade, as it is characteristic of immature or ‘green' pads, in which the resins still need to be driven out of the pad material, at the point where the pads meet the rotors. In this circumstance, the upper temperature limit of the friction material will not yet have been reached.
As when bedding-in any set of brakes, care should be taken regarding the longer stopping distance necessary with incompletely bedded pads. This first set of stops in the bed-in process is only complete when all ten stops have been performed - not before. The system should then be allowed to cool, by driving the vehicle at the highest safe speed for the circumstances, without bringing it to a complete stop with the brakes still applied. After cooling the vehicle, a second set of ten partial braking events should be performed, followed by another cooling exercise. In some situations, a third set is beneficial, but two are normally sufficient.
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