17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHWhining 996
Leading reported evidence
Replace there was a small leak
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 · Original poster
There was a seal on the diff that was also replaced - there was a small leak.
Leading evidence: 'Replace there was a small leak' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace before or' (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
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
Diff-oil was changed about 1 month ago, and there was no change before or after.
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 an unsuccessful attempt
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.
Unsuccessful attempt · Original poster
Diff-oil was changed about 1 month ago, and there was no change before or after.
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.
17 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: 20261027T035758Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Any ideas what the problem is here? My 2001 996 C4 (tip) has a noticeable "whine" coming from somewhere. Does not happen under hard acceleration, or when coasting, but only when holding a normal fixed-speed/light acceleration. I notice it in 4th and 5th gear the most at about 47-50mph: That's when it is loudest.
If it is whining in 4th and I shift to 5th and don't accelerate, it keeps whining with no change. So in my mind it's not the engine since it seems to be rpm independant. So that leaves transmission, diffs, wheel bearings, etc.
Any ideas? Thanks in advance
This sounds a bit nuts, but have you tried turning off the AC to see if it changes? Mine was making a “whirring” sound, turned out to be in need of an AC recharge.
Could be the pinion gear, transmission, or a wheel bearing. When was the last time the diff oil was changed?
Edit: also check that it�s not coming from the radio speakers (alternator or bad ground), or from wind (a window or sunroof seal, a front cooling fan bearing, etc.)
Diff-oil was changed about 1 month ago, and there was no change before or after. There was a seal on the diff that was also replaced - there was a small leak.
I am fairly certain it is from the drivetrain. If I "flutter" the accelerator at 47mpg I can make it play a tune
I noticed today it really seems RPM-independent. In 4th gear at 2,200RPM is whines (47mph). In 3rd gear at about 3,000RPM (also at 47mph) it whines.
I am secretly hoping it is just a wheel-bearing. If it's the transmission I am guessing it is on the output shaft.
Sounds like the "classic pinion bearing failure"..Part number
99630280800
Requires full trans disassembly. This job is to be done by professionals only, and specifically g96 /xx trans specialist, or the very mechanically inclined and not " faint of heart " DIY'ers...
Have had this issue myself, and it's not fun - but I don't know if the issue applied to OP's tiptronic trans.
Not saying it's not the problem, but the part number you referenced doesn't even apply to the tip cars.
Yep, you're right I missed the "tip" in my analysis, so my comment doesn't apply, nor does the part number.
The "Tip" is an A96 ZF trans, not a G96 Getrag..
MY A96 ZF Tip has a little "whine" at speeds, been doing it for 80K miles, just a little ring-n-pinion gear whine (not failing bearing whine)..
I don't worry about mine. I only hear it when listening for it (radio off, trying to listen for it), or get at the right speed with a light load on the throttle..
All gears make noise, they are never perfect. The hypoid cut ring-n-pinion gears are a lot quieter than straight cut gears, but still make noise.
My suggestion is get a professional to road test it and see if the noise is at an acceptable level, unless you want to make that determination yourself. I can't make that determination without hearing it in person.
