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Porsche Club GB

Porsche 996 Tiptronic Gearbox slipping

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

Discussion summary

YOUR RESEARCHPorsche 996 Tiptronic Gearbox slipping

Leading reported evidence

Replace transmission oil and filter seems

Suggestion or failed attempt

No successful repair reported for this finding.

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Suggestion

Probably need an auto transmission specialist to sort it, though just changing the transmission oil and filter seems to have been successful for some people (has that ever been done on your car?).

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Porsche 996 Tiptronic Gearbox slipping
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Leading evidence: 'Replace transmission oil and filter seems' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace transmission oil and filter seems' (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 · 0 partial discussions

Frequently discussed actions (1)

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Replace transmission oil and filter seems

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

Probably need an auto transmission specialist to sort it, though just changing the transmission oil and filter seems to have been successful for some people (has that ever been done on your car?).

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Porsche 996 Tiptronic Gearbox slipping
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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.

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

  • Porsche Club GB: 1 discussions

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

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Generation: 20261026T212127Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi, My 1999 Porsche 996 tiptronic box is slipping. Usually at low speeds the revs rocket and feels like I am loosing drive and the gears are slipping. When I take my foot off the accelerator it just changes up a gear and all is ok again. It does not seem to matter if the engine / gearbox are cold or warm and it is very intermittent. Anyone thoughts and much appreciated. Andy

POST 4Original post

I'm not an expert but likely to be clutch slip, either because the clutch bands inside the box are worn, or because the oil is too low or degraded, or maybe a valve problem. If you google "997 tiptronic clutch slip" or similar there are plenty of useful articles. Probably need an auto transmission specialist to sort it, though just changing the transmission oil and filter seems to have been successful for some people (has that ever been done on your car?). If the transmission needs to come out, one of the Rennlist threads indicates it is easier to remove the engine and transmission before splitting it rather than trying to remove the transmission from the engine in situ. Good luck.

POST 5Original post

hi there, I faced quite the same in the past. here's my story, hoping it could be of any help : bought my 996 at 100000miles : time to service the gearbox (according to Porsche), already too late (words of my indee). anyway, gearbox serviced, 8 liters if I remember well. Everything went fine until, one year later, at every gear up engine reving cca 1000-1500 rpm. I went to an automatic gearbox specialist => cleaning and refill oil => 15 liters ! torque converter was almost blocked by used and dirty oil. everything goes fine since (more than 2 years now). cheers. Pierre.

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