6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHTransmission input shaft spline lubrication
Reported or suspected cause
pretty sticky stuff like the optimoly 3ep
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
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Discussions that report identifying a cause
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Reported cause · Original poster
The sachet of spline lube turned out to be pretty sticky stuff like the Optimoly 3EP.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
I hadn't planned on lubricating the input shaft splines - so far as I can see the workshop manual doesn't call for the splines to be lubricated either.
Leading evidence: 'pretty sticky stuff like the optimoly 3ep' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'pretty sticky stuff like the optimoly 3ep' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Lubricate either' (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.
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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
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0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
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Performed · outcome unconfirmed · Original poster
I hadn't planned on lubricating the input shaft splines - so far as I can see the workshop manual doesn't call for the splines to be lubricated either.
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
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Suggestion · Original poster
There wasn't that much in the sachet of course so there was minimal excess lube after spreading the lube through /wiping the splines using the new clutch disc.
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
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Suggestion
I would then use the spline lube as its designated for such the job.
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Lubricate either
No successful repair reported for this finding.
0
Reported fixes
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Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed · Original poster
I hadn't planned on lubricating the input shaft splines - so far as I can see the workshop manual doesn't call for the splines to be lubricated either.
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
There wasn't that much in the sachet of course so there was minimal excess lube after spreading the lube through /wiping the splines using the new clutch disc.
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.
6 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: 20261026T161109Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'm in the process of putting my motor/trans back together and the Sachs clutch kit includes a sachet of spline lube. I hadn't planned on lubricating the input shaft splines - so far as I can see the workshop manual doesn't call for the splines to be lubricated either. Has anyone seen a Porsche reference that does call for the input shaft splines to be lubricated?
The only lube I'm using in the clutch area is some sticky Optimol 3EP on the release arm pivot/ball & slave cylinder rod to release arm contact point.
A thick sticky grease is preferred but only after a very thorough wire brushing of each and every spline. A little grease goes a long way. A copper based anti-seize also works well.
Thanks Chris, I have the Optimol 3EP which is plenty sticky but the Sachs kit includes a sachet of lube which is labelled as "spline lube" so one would figure that if the clutch OEM provides some lube with its clutch kit then the lube would be fit for purpose. I was just surprised as up until then I had been under the impression that input shaft splines should not be lubricated in order to avoid throw-off lube contaminating the clutch friction surfaces.
I think I will use the OEM lube, I did some more researching and found another OEM reference which said to apply the correct lube sparingly, then momentarily fit the clutch disc to spread the lube, remove disc & wipe up any excess then re-fit disc. That seems like a sound approach to me.
The sachet of spline lube turned out to be pretty sticky stuff like the Optimoly 3EP. There wasn't that much in the sachet of course so there was minimal excess lube after spreading the lube through /wiping the splines using the new clutch disc. The pics of the clutch work are on my engine DIY page.
This is a source reference. Confirm exact model applicability in the original material.
