13 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPorsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace ...and
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
Gear oil was just changed...and that was pretty much all.
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed work
Recommend transaxle: 75w90 gl5
No successful repair reported for this finding.
0
Reported fixes
0
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
I just saw in your sig that yours in a 1989, so I put that into the redline application guide and this is what it recommended for the transaxle: 75W90 GL5
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Replace ...and' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Recommend transaxle: 75w90 gl5' (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 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
Replaced all of mine...not cheap but that specific shimmy and shake is easy to understand.
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use delvac in the diffs
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
I use the delvac in the diffs for my tacomas (well I sold one so the one that is left
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use on my vehicles
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
And redline makes a couple of GL4s, the MT90 is the one I use on my vehicles that call for a GL4:
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Recommend transaxle: 75w90 gl5
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
I just saw in your sig that yours in a 1989, so I put that into the redline application guide and this is what it recommended for the transaxle: 75W90 GL5
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (10)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Recommend transaxle: 75w90 gl5
No successful repair reported for this finding.
0
Reported fixes
0
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
I just saw in your sig that yours in a 1989, so I put that into the redline application guide and this is what it recommended for the transaxle: 75W90 GL5
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Use mobil delvac
No successful repair reported for this finding.
0
Reported fixes
0
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 · Original poster
We did a gear oil change and he thinks that even though they use Mobil Delvac on all their Pcars with no issue that this LSD is not happy with it and the plates in the lsd are catching.
Porsche related issue but not boxster - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Coverage and how to read this overview
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.
13 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
986Forum: 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: 20261026T135432Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Need help. Anyone ever here of or have this problem? Porsche 944 turbo. I let the clutch out while dead stop going straight and have no issue. But if I am turning left or right from a dead stop, I start letting clutch out, turn wheel and the car shutters and shakes...ONLY when turning either left or right and only from a dead stop.
Gear oil was just changed...and that was pretty much all.
Any thoughts?
Since the wheel is turned it requires more power to get the vehicle moving. Tire scrub, etc. I think you have no problem. Give it a little more throttle. Similar to starting going uphill.
Yes Ian...lsd. Went back to my mechanic this morning and we both drove it. As he told me it is coming from the rear...I thought front but the vibrations etc are coming up through the torque tube to the clutch and motor shaking the front end. We did a gear oil change and he thinks that even though they use Mobil Delvac on all their Pcars with no issue that this LSD is not happy with it and the plates in the lsd are catching. He did not add an additive to it. Going back Monday and we are going to swap the tranny oil with Motul 300 LS and see how that responds. These older cars get fickle in old age and mileage... But I tell you what.. Get out of turning in first gear and have at it...this car MOVES and always a thrill to drive!
They're both ls type aren't they ?
Maybe Try an ns type oil ?
There is a lot of info out there about gl4 and gl5 , and using thicker gl4 to overcome gl5 problems .
Very confusing
The redline application guide says this car should use their MT-90, which is a GL-4. I think Mobile Delvac is a GL-5. I use the delvac in the diffs for my tacomas (well I sold one so the one that is left
) and in my FJ cruiser. I use the MT90 in the 5 speed in the Tacoma, and also my son's Miata transmission, which hates GL5.
It could very well be the fluid, and there are not many GL4 out there. I think Brad Penn makes one:
http://www.summitracing.com/search/product-line/brad-penn-multipurpose-classic-gl-4-gear-oil
And redline makes a couple of GL4s, the MT90 is the one I use on my vehicles that call for a GL4:
Red Line Synthetic Oil - Gear Oil for Manual Transmissions - MT-90 75W90 GL-4 Gear Oil
Edit: I may be way off, I was putting in 1988 Porsche 944 Turbo into the redline application guide for the above. I just saw in your sig that yours in a 1989, so I put that into the redline application guide and this is what it recommended for the transaxle: 75W90 GL5
http://www.redlineoil.com/product.aspx?product=58304
Sounds like that is about the same as the Mobile Delvac 75W90. Good luck, hopefully a fluid change will help.
Steve
Thanks Steve. We discussed redline as well. They make one called swepco that a lot of 944 guys use as well. Trial and error, or I rip the whole transmission out and start over, cause you know, I have millions of dollars to spend on a car...why not...lol. Pain in the but. I am missing both my Boxsters right now!
Yeah, they are.m it's amazing what a 4 cylinder can do. Mine is the 89 turbo with the 88 S options so bigger turbo, 928 s4 brakes, m030 suspension and parts...and of course we added the chip to kick it up a little.
I wish the 986/987 could be upgraded like these.
The only time that I get shuttering on the 944 Turbo is when I don't give it enough throttle (straight or turning or whatever) - then it shakes like crazy. There could be something wrong, but in my car I just give it a little more right foot!
Now that sounds like motor mounts or tranny mount. Replaced all of mine...not cheap but that specific shimmy and shake is easy to understand. This is because the gear oil is not right for the lsd. We are replacing on Monday.
This is a source reference. Confirm exact model applicability in the original material.
