7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSpeed-related ticking sound
Reported or suspected cause
speedo cable dying
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
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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.
Reported cause · Original poster
I have had a similar noise on a different car (can't remember which) and it was the speedo cable dying.
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
Have followed this thread with interest as I too have a 'rhythmic' noise associated with road speed on my '77 911 Sportomatic but only for the first few hundred yards from rest - after which it disappears completely until setting off again from low speed.
Leading evidence: 'speedo cable dying' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'speedo cable dying' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Set off' (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
Have followed this thread with interest as I too have a 'rhythmic' noise associated with road speed on my '77 911 Sportomatic but only for the first few hundred yards from rest - after which it disappears completely until setting off again from low speed.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Set off
No successful repair reported for this finding.
0
Reported fixes
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Unsuccessful attempts
1
Discussions
Read evidence and context
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
Have followed this thread with interest as I too have a 'rhythmic' noise associated with road speed on my '77 911 Sportomatic but only for the first few hundred yards from rest - after which it disappears completely until setting off again from low speed.
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.
7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
911uk: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
Haven't fixed it yet, but can generally stop noise by slightly applying handbrake while moving, then releasing it.
A little while ago, my 1979 SC developed a "ticking" sound.
It seems to come from the middle of the car. I know these things can be deceptive, but I am at least sure it's not from the front. I really don't think it's a trim rattle/squeak.
The noise frequency varies with road speed, not with engine speed.
The noise is not loud, but is easily perceptible at moderate speeds. It is not metallic.
Everything seems to be working correctly and there are no vibrations accompanying the noise.
Any thoughts as to where I should look for a cause and remedy?
I have had a similar noise on a different car (can't remember which) and it was the speedo cable dying. Is this possible on an 911 SC? Does it even have a speedo cable (I see no mention of one in parts catalogues, so imagine maybe it's electronic)?
Migration info. Legacy thread was 3910
Hi Peter
Try this link:
http://forums.pelicanparts.com/showthread.php?s=db546a022c1670c217b69db17f220124&threadid=97658
Cheers, James
Migration info. Legacy thread was 3913
Thanks for the article reference.
So, the Pelican Parts forum article suggests that the speedo is electronic, and indeed their parts list says "Electronic Speedo 1976-1989". So, I don't have a speedo cable noise, then!
The article refers to a ticking noise from an "OXS counter". What's that (sorry if I'm being dumb)?
Any other suggestions for a possible source of such a noise?
Migration info. Legacy thread was 3922
they do not have a mechanical link to speedo which is good news if you are limited mileage
insurance
, you have'nt anything wrapped around a drive shaft have you?
Migration info. Legacy thread was 6526
I should have finalised this thread earlier. I traced the problem to the handbrake. Something in there is making this noise. Haven't fixed it yet, but can generally stop noise by slightly applying handbrake while moving, then releasing it.
Migration info. Legacy thread was 6530
Right the handbrake, is similar to the landrover design, in that it brakes via the transmission, so no handbrake turns unless you have extra deep pockets, you have most likely something trapped around a drive shaft after all, no great worry though, one for inspection at MOT should find it
Migration info. Legacy thread was 6533
Have followed this thread with interest as I too have a 'rhythmic' noise associated with road speed on my '77 911 Sportomatic but only for the first few hundred yards from rest - after which it disappears completely until setting off again from low speed.
Similar symptom in that mine also sounds like it comes from the 'middle of the car' For this reason I hadn't made the connection with the handbrake but will certainly be investigating this further.
Richard Harrison mentions 'transmission handbrake' - on a 911?? As far as I'm aware it's a combined disc/drum assembly acting directly on the hubs as in most other vehicles.
Migration info. Legacy thread was 6640
This is a source reference. Confirm exact model applicability in the original material.
