Planet-9

Driveline lash

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5 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCHDriveline lash

Leading reported evidence

Check has

Performed · outcome unconfirmed

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Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed
yet, but every other car I've checked has that sort of free motion in the diff: there's play designed into the spider gears and the plates in the LSD.
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Driveline lash

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Leading evidence: 'Check has' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'culprit in all three cases' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check has' (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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1 matching discussions · 5 captured posts examined · 1 partial discussions

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culprit in all three cases

Suggestion or failed attempt

No successful repair reported for this finding.

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Identified cause: 1
Suspected cause: 0
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Discussions that suspect a cause: 1

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Suspected cause
Personally I suspect the culprit in all three cases to be the Dual Mass Flywheel, but I have never been able to definitively sort it out.
Original post Read captured discussion
Driveline lash

Repair shop

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No successful repair reported for this finding.

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Discussions that contain suggestions: 1

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Suggestion
I've delayed replying until I could check in with my independent repair shop.
Original post Read captured discussion
Driveline lash

Replace valve timing

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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

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Suggestion
After doing some reading I'm pretty sure this is just where the car is changing the valve timing.
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Driveline lash

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Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
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Discussions that contain suggestions: 1

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

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Suggestion
My 2009 CS has significant drivetrain lash (to use a term from my motorcycle days) and I wonder if others have similar lash.
Original post Read captured discussion
Driveline lash

Frequently discussed actions (4)

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Check has

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
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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
yet, but every other car I've checked has that sort of free motion in the diff: there's play designed into the spider gears and the plates in the LSD.
Original post Read captured discussion
Driveline lash

Repair shop

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion
I've delayed replying until I could check in with my independent repair shop.
Original post Read captured discussion
Driveline lash

Replace valve timing

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion
After doing some reading I'm pretty sure this is just where the car is changing the valve timing.
Original post Read captured discussion
Driveline lash

Use term

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that contain suggestions: 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.

Suggestion
My 2009 CS has significant drivetrain lash (to use a term from my motorcycle days) and I wonder if others have similar lash.
Original post Read captured discussion
Driveline lash

Reported and suspected causes (1)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

culprit in all three cases

No successful repair reported for this finding.

0
Identified cause: 1
Suspected cause: 0
Reported fixes

Read evidence and context

Discussions that suspect a cause: 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.

Suspected cause
Personally I suspect the culprit in all three cases to be the Dual Mass Flywheel, but I have never been able to definitively sort it out.
Original post Read captured discussion
Driveline lash

Coverage and how to read this overview

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.

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

Planet-9: 1 discussions

0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1Original post

My 2009 CS has significant drivetrain lash (to use a term from my motorcycle days) and I wonder if others have similar lash. The attached video is with the car in gear and the other rear wheel on the ground. The car has OEM LSD. Bolts and connection for the shaft and flange at the differential look fine. Any thoughts? BTW, don't bother to mention the curb rash - I've already talked to her. Thanks

POST 2Original post

Haven't tried it on the Cayman yet, but every other car I've checked has that sort of free motion in the diff: there's play designed into the spider gears and the plates in the LSD. So I suspect that's perfectly normal. When differentials are worn they will whine or clunk while driving. In the absence of either of those I think you're fine.

POST 3Original post

Can you describe the symptoms a little more in depth? By that, I mean what does the car actually do while driving specifically? Mine has an issue that may be similar, and I had a nearly identical issue on my previous two cars, BMW 135i and 540i respectively. Personally I suspect the culprit in all three cases to be the Dual Mass Flywheel, but I have never been able to definitively sort it out. The issue in my case is a feeling like something has shifted when accelerating at times. Basically it feels like the engine shifted on it's mounts, or the clutch suddenly slipped for just an instant and then grabbed again. It's not a massive thing, most people would probably ignore it, but it annoys me to no end.

POST 4Original post

Differential wouldn't cause those symptoms during steady acceleration. When I bought my Cayman I was worried the clutch was slipping as there was a slight hiccup between 2500-3000 under certain throttle conditions. Not much, but I noticed it. After doing some reading I'm pretty sure this is just where the car is changing the valve timing.

POST 5Original post

I've delayed replying until I could check in with my independent repair shop. The reason for posting originally was a clunking noise over bumps. Final report was a failing front control arm. That's been replaced and the clunking is gone. No association with the driveline lash. Bern

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