4 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 Automatic Transmission / Tiptronic Torque Converter Lock issue
Leading reported evidence
Check electrical/signal connections
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
In fact check all electrical/signal connections to the Tip.
Leading evidence: 'Check electrical/signal connections' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check electrical/signal connections' (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.
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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
The fluid could use a change (not terribly dirty), but the level is OK.
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
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Suggestion · Original poster
If I dig that deep, I'll replace the valve body with a rebuilt one and change the fluid all at once.
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
If I dig that deep, I'll replace the valve body with a rebuilt one and change the fluid all at once.
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.
4 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 · 1 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261026T152433Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
All,
I�ve done an exhaustive search both on this forum and google and I can�t find an answer to my problem. I have a 2001 non turbo C2 996 cabrio with a automatic/tiptronic trans.
The transmission�s torque converter unlocks VERY easily. If I�m cruising at 70mph and I give it more than 5% throttle, it unlocks. Once it unlocks, I cannot get the torque converter to re-lock unless I completely let of the gas pedal. Needless to say, my gas mileage is suffering and it takes some effort to try and keep the torque converter locked while at speed. I do NOT have any DTC codes and there is no check engine light. Therefore, I assume this issue if likely mechanical and not electrical.
My thoughts on the problem:
1.Soft failure of the throttle position senor (integrated with the electronic throttle body)
2.Bad TCC solenoid in the valve body
3.Bad valve body (valves leaking by/not properly seating or diverting fluid)
4.Bad Torque Converter
Any comments of help would be appreciated.
While there will not be any DTC's -- obtainable via some off the shelf OBD2 code reader -- there is likely Porsche proprietary error codes available from either the DME of the Tip controller.
You will need access to a PST2 (Porsche System Tester 2) or the newer tool: PIWIS (I think I have that right).
Durametric may offer the ability to obtain transmission/drive train related error codes, too.
Can you check the condition of the lockup solenoid and its electrical connections and wiring condition?
In fact check all electrical/signal connections to the Tip. An edumacated guess is the Tip needs throttle input (the amount of torque being demanded by the driver) and speed too.
Also, what about the Tip fluid level?
Macster, thanks for your reply. I'm pretty technical savvy. I rebuilt the engine in this car a year ago. Anyway, back to the subject:
The level in the trans is fine. The fluid could use a change (not terribly dirty), but the level is OK. I don't use a generic scanner. I have an Autel scanner (I can't remember the exact model number, but it was in the $300 price range). The lockup solenoid is on the valve body. If I dig that deep, I'll replace the valve body with a rebuilt one and change the fluid all at once.
