1 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 3.4 ZF tiptronic differential bearings replacement
Leading reported evidence
Clean i can't see why they can't just focus
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
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Suggestion · Original poster
If they're careful and clean, I can't see why they can't just focus on the diff.
Leading evidence: 'Clean i can't see why they can't just focus' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean i can't see why they can't just focus' (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.
Replace responsive kick-down, no noises, juddering etc
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
Quick changes, responsive kick-down, no noises, juddering etc.
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.
1 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.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T070717Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi,
I cant find tiptronic differential rebuild instructions for an early 996 C2 anywhere on the net, manuals, boxsters, no 996. I know the official line is complete replacement but I can't believe bearing replacement is rocket science or has to cost �3K+. A bold statement I know but let me explain.
My car is suffering from diff whine, noticeable when power on, quiet when off. My local Porsche specialist suspects a pinion bearing and that sounds reasonable after 126K miles. The tiptronic box is fine. Quick changes, responsive kick-down, no noises, juddering etc. Several companies offering gearbox services want a complete gearbox rebuild. Why? I know they have to warrant their work so I suppose they want to be sure but if it is only bearings I don't see it. I realise they have to open the whole box because it's the A96.00 ZF which has the gearbox and diff in the one casing, not the Mercedes split-casing type. If they're careful and clean, I can't see why they can't just focus on the diff.
So my questions, assuming I want to get someone to change just the 3 bearings (pinion, inner and outer diff) and by the way I won't be doing it myself
a) am I being naive?
b) can't any decent mechanic do it?
c) is there a documented procedure for it anywhere or someone on the forum with prior experience?
d) would it be cheaper to convert it to a manual?
e) if yes/no/no/no can I run it asis maybe with an oil change and permanent ear-plugs but for how long before it gets terminal?
f) if yes/no/no/no/no can I at least get some sympathy?
I have a very quiet engine, no IMS or bore-scoring issues and everything has been done on my car, brakes, coolant and fuel lines, suspension, plugs, coils, injectors, it's a nice car, full service history stamped up, a proper car. Not worth as much as a manual of course which is why I can't just shell out �3-4K on the less desirable tiptronic version and if I try to sell it, it's going to be obvious it has an issue and it may be hard to shift anyway. Shame to waste such a good car on what is sadly a rare but very expensive problem.
Yes, I can buy a used box but how will I know that hasn't the same problem? Most ebay sellers are quite happily asking �1300-�2000 for an equally high-mileage box without any mention of it's condition. Who's buying them?
All replies appreciated....we live in hope!
Thanks
Stuart
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