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996 C4 Transmission Replacement

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12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

Discussion summary

YOUR RESEARCH996 C4 Transmission Replacement

Leading reported evidence

Replace 4s

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

Here is a pic from a post by Captain Obvious....he changed his 4S to rear wheel drive.

996 C4 Transmission Replacement
Read full discussion summary

Leading evidence: 'Replace 4s' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'better option than trying' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Replace 4s' (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.

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1 matching discussions · 12 captured posts examined · 0 partial discussions

Compare 4 other evidence results

better option than trying

Suggestion or failed attempt

No successful repair reported for this finding.

0
Identified cause
1
Suspected cause
0
Reported fixes
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 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

That is probably the better option than trying to find a new tranny.

996 C4 Transmission Replacement

Replace early 996 c4 transmission

Suggestion or failed attempt

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 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

At least this process has been logged here should anyone else need to replace an early 996 C4 transmission with a newer variety.

996 C4 Transmission Replacement

Replace g96/30

Suggestion or failed attempt

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 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

I recently bought a G96/31 gearbox to replace my G96/30.

996 C4 Transmission Replacement

Run into a snag

Suggestion or failed attempt

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 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

I've run into a snag.

996 C4 Transmission Replacement
Frequently discussed actions (4)

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

Replace 4s

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

Here is a pic from a post by Captain Obvious....he changed his 4S to rear wheel drive.

996 C4 Transmission Replacement

Replace early 996 c4 transmission

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

At least this process has been logged here should anyone else need to replace an early 996 C4 transmission with a newer variety.

996 C4 Transmission Replacement

Replace g96/30

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

I recently bought a G96/31 gearbox to replace my G96/30.

996 C4 Transmission Replacement

Run into a snag

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

I've run into a snag.

996 C4 Transmission Replacement
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.

better option than trying

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

That is probably the better option than trying to find a new tranny.

996 C4 Transmission Replacement
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.

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

  • Rennlist: 1 discussions

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

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

Outcome without a verified action link

It worked out great.

No unique explicit quoted action; no causal link assigned

Generation: 20261027T173940Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I recently bought a G96/31 gearbox to replace my G96/30. Upon installation.. I've run into a snag. Notice the front driveshaft output shaft, it's about 2" longer. Has anyone else dealt with this? I assume the only option (besides finding another G96/30 box would be to either replace the front drive shaft or bring it into a machine shop to have it shortened and balanced? Please note in the picture that the old transmission case is just the case, without the internals in it. Therefore the output shaft for the front drive shaft isn't in the picture.

POST 2Original post

I'm remembering back when I dropped motor with the tranny attached. When I dis-engaged the drive shaft on my C4 I slid it forward. I'm thinking the driveshaft is 2 pieces with one pc sliding into the other. If it were one pc how would you remove it to begin with? Similar to a driveshaft on a farm implement when hooking it up to the PTO on the tractor.

POST 3Original post

Weird, I would look into it further and see if there are any other differences. Please share what you find out. It shouldn't be too expensive to get a driveshaft made. That is probably the better option than trying to find a new tranny.

POST 4 / ORIGINAL POSTEROriginal post

Here's some photos of the drama.. It was making noise when I bought it, so I am not sure what was the root cause of a first gear that looks/looked like this..

POST 5Original post

Here is a pic from a post by Captain Obvious....he changed his 4S to rear wheel drive. How much distance (play) do you have if you push the driveshaft forward?

POST 7 / ORIGINAL POSTEROriginal post

I've got it at my shop, so I am not 100%. I just got off the phone with them and they 'believe' there is enough room on the slip joint. We'll find out soon enough

POST 8 / ORIGINAL POSTEROriginal post

Well.. The driveshaft on for the G96/30 transmission is, infact, different than the one for the G96/31. The G96/31 is roughly 2" shorter. As a fatter of fact, the drive shaft for the 996 AND 997 turbo cars is exactly the same as the G96/31 uses. Strange facts from the Porsche camp.

POST 9Original post

Quotes source post: 11935830

Bummer....consider buying used. Ebay has several.

POST 10 / ORIGINAL POSTEROriginal post

Thank you, I was able to procure one from the owner of my shop. They converted his EVOM775 997 to a 2wd RS race spec. So they had the left over parts. It worked out great. At least this process has been logged here should anyone else need to replace an early 996 C4 transmission with a newer variety.

POST 11 / ORIGINAL POSTEROriginal post

[Image-only post; no author-written text. Original image references:] https://cimg8.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/image_a03350da9322f2bc7bad406d20566565f694e2e2.jpg https://cimg0.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/image_163b064bba9a6f453553e9b58f13a6db751755b8.jpg https://cimg2.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/image_1eba8a589e9d9862171e39df3bcd826e9e44f62a.jpg https://cimg3.ibsrv.net/gimg/rennlist.com-vbulletin/2000x1504/image_ee91b74b5e4d2aa2d695c99a1ae4447bf735114d.jpg

POST 12Original post

I am trying to do the exact same swap. May I ask what is the part that you actually procure to solve the 2" short problem? thanks in advance.

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