5 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTransmission noise!!! HELP PLEASE!
Leading reported evidence
Replace transmission shaft bearings and the noise continues
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
The mechanic has already disassembled the front transmission and has not found anything strange, we have already changed the transmission shaft bearings and the noise continues.
Leading evidence: 'Replace transmission shaft bearings and the noise continues' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace due' (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.
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
The 4WD model 996's are very very critical to run correct size tires of equal wear...It is an OEM recommendation is to NEVER replace the front tires without also replacing the rears at the same time with correct sizes....
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.
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
FWIW :: Viscus Clutch damage is usually caused by running mismatched tires front to back....
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
The 4WD model 996's are very very critical to run correct size tires of equal wear...It is an OEM recommendation is to NEVER replace the front tires without also replacing the rears at the same time with correct sizes....
Replace transmission shaft bearings and the noise continues
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
The mechanic has already disassembled the front transmission and has not found anything strange, we have already changed the transmission shaft bearings and the noise continues.
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.
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: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hello ,
I recently purchased a 996 C4 Titronic.
I come here to ask for your help, if possible.
The car makes a strange noise when I drive at low speeds, about 50 km/h. The mechanic has already disassembled the front transmission and has not found anything strange, we have already changed the transmission shaft bearings and the noise continues.
Has anyone had this problem, do you know what it is?
Here's a video with the metallic noise you hear.
Many thanks!
M�rio
You Tube
Strange noise indeed !!! .............Make a longer video under different scenarios to give more clues .....
Ie .. keep the noise going as long as possible.......ie .. does the noise occurs at same speed with different RPMs/gear? ie.. does noise change due to left or right turns? ie... does the noise change under braking/accelerating? ie.. does the noise re-occurs at twice the speed? ie.. does the noise only occurs hot/cold engine temp?
Porschetech3,
The Sound come and Go, it’s difficult to keepet, long time.
No matter if is cold or hot, it always appear at this speeds, and only a this speeds….
I would say your viscus clutch is failing by the sound and description .... Part # 6 in the diagram......
Have your Tech install some "electronic ears" to the tube that goes to front drive axle and have a listen......
Pos Part Number Description Qty. Needed Price 1
90012401302
Screw Plug M 18 X 1,5 1 $8.92 (1)
90012401302
Screw Plug M 18 X 1,5 1 $8.92 2
99733230900
Joint Flange 2 $262.05 3
99911345441
Shaft Sealing Ring 40 X 60 X 9 2 $22.00 (3)
99911345441
Shaft Sealing Ring 40 X 60 X 10 2 $22.00 4
99633231100
Circlip 2,5 X 20 2 $5.55 5
99630107100
Bleeder 17 X 12 1 $8.35 6
99633902102
Viscous Clutch 1 $2,119.60 7
90023417400
Support Washer 20 X 28 X 2,0 1 $3.23 8
99904102101
Circlip 20 X 1,2 1 $3.23 9
90012401401
Screw Plug M 18 X 1,5 Pm 1 $16.06 (9)
90012401401
Screw Plug M 18 X 1,5 Pm 1 $16.06 10
99970745540
O-Ring 123 X 3 1 $24.61 11
N90366001
Torx Screw M 8 X 36 For 996.349.010.02 Getrag 630.0.0130.00 Old Version 4 - (11)
90038514101
Torx Screw M 8 X 40 For 996.349.010.03 Getrag 630.0.0173.00 New Design 4 $12.81 13
N90366001
Torx Screw M 8 X 36 8 - -
00004320923
Grease Liqui Moly Pu 53 / Wdr 50 Gr. X -
FWIW :: Viscus Clutch damage is usually caused by running mismatched tires front to back.... The 4WD model 996's are very very critical to run correct size tires of equal wear...It is an OEM recommendation is to NEVER replace the front tires without also replacing the rears at the same time with correct sizes....
This is a source reference. Confirm exact model applicability in the original material.
