Pelican Parts

996 broken bellhousing and engine vibration -Please Help-

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2 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH996 broken bellhousing and engine vibration -Please Help-

Leading reported evidence

Replace motor mounts

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.

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
I changed the motor mounts.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Frequently discussed work

Replace dual mass flywheel and had it go away

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 · Original poster
Has anyone seen that before and replaced the dual mass flywheel and had it go away?
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Read full discussion summary

Leading evidence: 'Replace motor mounts' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace dual mass flywheel and had it go away' (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.

Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.

Read captured replies

1 matching discussions · 2 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Replace transmission and clutch

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
I replaced the transmission and clutch.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Run motor it vibrates severely

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 I run the motor it vibrates severely.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Replace dual mass flywheel and had it go away

Suggestion or failed attempt

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 · Original poster
Has anyone seen that before and replaced the dual mass flywheel and had it go away?
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Test dual mass; it is a "go-no go"

Suggestion or failed attempt

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
Do a search, there is a simple twist or defection test for the dual mass; it is a "go-no go" test, so there is no guess work.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Frequently discussed actions (5)

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

Replace dual mass flywheel and had it go away

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 · Original poster
Has anyone seen that before and replaced the dual mass flywheel and had it go away?
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Replace motor mounts

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
I changed the motor mounts.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Replace transmission and clutch

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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
I replaced the transmission and clutch.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Run motor it vibrates severely

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

Read evidence and context

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 I run the motor it vibrates severely.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

Test dual mass; it is a "go-no go"

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
Do a search, there is a simple twist or defection test for the dual mass; it is a "go-no go" test, so there is no guess work.
Original post Read captured discussion
996 broken bellhousing and engine vibration -Please Help-

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.

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

Pelican Parts: 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: 20261026T183130Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I recently purchased a 99 911 Carrera 4. I knew it had problems and paid a low price accordingly. When I got it I found the transmission bellhousing to be cracked all the way around. I replaced the transmission and clutch. When I run the motor it vibrates severely. It always vibrates, but gets really bad above 3000 rpms. It vibrates with the clutch pushed in and shifter in neutral as well as when I am driving it. When driving I can feel a bad shudder in the clutch pedal when shifting. No check engine light and the motor seems to start up fine. It seems to have plenty of power. outside the car, you don't hear any weird noises from the engine and it doesn't clunk when I engage the clutch. There is no body damage to the car or underside of the engine to suggest that it was in an accident. I do not know if the vibration caused the tranny to crack or something else caused the damage and vibration. There are no metal shavings in the oil. I changed the motor mounts. I have even ran the motor without the transmission installed and still got the shaking. Is it possible that the flywheel is bad? Has anyone seen that before and replaced the dual mass flywheel and had it go away? I do not want to purchase one only to have it not be the problem.

POST 2Original post

Do a search, there is a simple twist or defection test for the dual mass; it is a "go-no go" test, so there is no guess work.

This is a source reference. Confirm exact model applicability in the original material.