9 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWarranty issues - Gearbox/Diff and PCM
Reported or suspected cause
gearbox bearing
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
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 report identifying 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.
Reported cause
OPC checked the car and advised it was the gearbox bearing.
Leading evidence: 'gearbox bearing' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'gearbox bearing' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Check car and advised it was the gearbox bearing' (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 report identifying 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.
Reported cause · Original poster
The second issue is the PCM system (Bose upgrade).
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
OPC checked the car and advised it was the gearbox bearing.
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
You've obvioulsy checked all the various settings on the PCM - silly question I know!
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
They sorted out the warranty claim with Porsche and fitted a new gearbox.
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 · Original poster
I suspect the best course is to get the car to Porsche but obviously I'd like to be have confidence that these will be warranty jobs, otherwise both sound potentially very expensive......
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.
9 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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Recently (3 months ago) purchased an 02 996 Carrera 4 (facelift)from a good independant dealer and also got the all important Porsche warranty. Cars done 24k miles and had 3 owners. Two issues have arisen and as a newcomer I'd be grateful for members thoughts.
First, I have noticed a whine from the rear (diff/gearbox?) in the last couple of weeks. Its particularly pronounced in town ie at low speeds, in 1st or 2nd and where the PSE has not kicked in. Its a real irritation now and passengers comment on it too! The car has occasionally jumped out of 2nd gear too, which I have read can be a telltale sign of potential problems.
The second issue is the PCM system (Bose upgrade). The Sat Nav still operates but with no volume. The Radio is "frozen" and none of the adjuting buttons operate. Again no sound at all. CD and Cassette are similarly non operative. I don't use the phone.
Any thoughts on the potential causes of/remedies for my problems? I suspect the best course is to get the car to Porsche but obviously I'd like to be have confidence that these will be warranty jobs, otherwise both sound potentially very expensive...... Thoughts?
I recently purchased an 02 C4S and had occasional problems with second gear. Sometimes it just wouldn't go all the way in and would jump out. I took it back to the OPC who advised that synchro had gone on second. They sorted out the warranty claim with Porsche and fitted a new gearbox. Mines done 22k miles.
Be very grateful you have the warranty as the Gearbox and Diff will be under the warranty. Don't know what the Diff cost is but I know the Gear Box is 5k.
The PCM (and this is from memory, I am not looking at my warrnty info here) is not covered under the warranty
Thanks for these responses. I rather suspected as much about the PCM not being covered. I've now checked and that is correct. I'll book it in and hope for the best!
As regards the PCM; try pulling fuse D8 in the fuse box (if you haven't already); this should re-boot the PCM. You've obvioulsy checked all the various settings on the PCM - silly question I know!
I had the same sort of noise from my 98 car, thought it was a wheel bearing. OPC checked the car and advised it was the gearbox bearing. Changed the complete box under warrenty, also had a new clutch fitted at the same time - did not charge me labour for this. OPC was Tonbridge.
Thanks for these posts. Asked a friendly Porsche trained engineer to look at/listen to it first. Whine I'm pleased to say has been dignosed as a bearing - one of the pulleys I gather which is a quick and cheap fix. PCM was fixed by him simply taking it out, pulled all the wires off the back, stuck them on again and hey presto!! Clever guy. Cost me a beer which cant be a bad deal compared to what the OPC would've been.
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