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Bad shudder when braking, but no steering wheel vibration

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YOUR RESEARCHBad shudder when braking, but no steering wheel vibration

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Replace front rotors a little while back)

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Performed · outcome unconfirmed · Original poster
When braking moderately hard at highway speeds I am getting a very noticeable shudder/rumble when applying the pedal, but no shake at the steering wheel (already changed the front rotors a little while back).
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Bad shudder when braking, but no steering wheel vibration

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Leading evidence: 'Replace front rotors a little while back)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace front rotors a little while back)' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Replace front rotors a little while back)

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
When braking moderately hard at highway speeds I am getting a very noticeable shudder/rumble when applying the pedal, but no shake at the steering wheel (already changed the front rotors a little while back).
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Bad shudder when braking, but no steering wheel vibration

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

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Generation: 20261027T073501Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

When braking moderately hard at highway speeds I am getting a very noticeable shudder/rumble when applying the pedal, but no shake at the steering wheel (already changed the front rotors a little while back). I've also noticed a slight chirping noise from the rear at low speed when the brakes aren't applied, and the braking seems quite uneven & grabby when coming to a stop from even very low speed. Could this be a warped rear rotor (they've been turned before), or a parking brake in need of adjustment - or both?

POST 2Original post

Pad deposition possibly. http://www.stoptech.com/tech_info/wp_padremoval.shtml

POST 3Original post

+1, re-bed your brakes.

POST 4 / ORIGINAL POSTEROriginal post

I've read that re-bedding the rears is difficult since it requires the fronts to get to the point of lock-up to generate the required friction in back. Or are you referring to re-bedding the fronts? I'd think any amount of pad deposition in front would create some steering wheel shake. And do I really need Hawk Blues to do this or will my existing (stock) pads be up to it? Buying a set of Hawks isn't much less expensive than simply getting new rear rotors from Suncoast. Thanks for the input.

POST 5Original post

go really fast backwards and hit the brakes. just kidding... sort of.

POST 6Original post

Warped rotors on a modern Porsche = virtually non-existent. Hawk Blues are very, very corrosive. Even the Hawk rep will readily tell you (did me) that -

POST 7 / ORIGINAL POSTEROriginal post

Quotes source post: 6514301

Even if they've been resurfaced? I think I'll have to try a set of the Blues for this job, the shake & rumble is really annoying.

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