12 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOff/on Vibration above 70 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Leading reported evidence
Replace (at no cost) and i never had the problem
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
Years ago, a name brand, steel belted radial on one of my cars was impossible to balance correctly.......the reason: some of the steel belting "shifted" either while in use or during manufacturing.......it was replaced (at no cost) and I never had the problem again.
Off/on Vibration above 70 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Read full discussion summary
Leading evidence: 'Replace (at no cost) and i never had the problem' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace (at no cost) and i never had the problem' (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
During the oil change I did not see any obvious issues with any suspension problems, but that does not mean the old rubber bushings needs replacing.
Off/on Vibration above 70 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Test drive
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
Just bought a new set of tires and trip to Dallas was my 1st test drive.
Off/on Vibration above 70 - 986 Forum - The Community for Porsche Boxster & Cayman Owners
Frequently discussed actions (3)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Replace (at no cost) and i never had the problem
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
Years ago, a name brand, steel belted radial on one of my cars was impossible to balance correctly.......the reason: some of the steel belting "shifted" either while in use or during manufacturing.......it was replaced (at no cost) and I never had the problem again.
Off/on Vibration above 70 - 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.
12 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: 20261027T044418Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I have a new to me 07 Boxster base, 58k miles. The PO put new Michelins on the car recently.
When I am driving above 70 mph, I get a quick shake, felt in the seat not the steering wheel, then back to smooth. Cycle repeats at about a 1 to 2 sec interval.
Looking around the net, sound like maybe a motor mount, since it seems to be rear end problem. Raising the spoiler earlier than 75 does not seem to make a difference. Speeding up, the cycle does not noticeably change in frequency. Top up or down does not seam to make any different either. Since it is not continuous I assume the tires are probably not the issue.
During the oil change I did not see any obvious issues with any suspension problems, but that does not mean the old rubber bushings needs replacing.
Any thought on what I need to look at.
Thanks.
+1
Since it's not in the steering wheel, chances are a rear tire is out of balance. Just bought a new set of tires and trip to Dallas was my 1st test drive. Now have a vibration at 70+ in the steering wheel that wasn't there with my worn out tires. Grrr. Will be going back for a rebalance when I get home.
FYI....although it's a rarity, some tires are defective by being manufactured "out of balance". If that's the case it's almost impossible to balance them and they should be returned for replacement.
Years ago, a name brand, steel belted radial on one of my cars was impossible to balance correctly.......the reason: some of the steel belting "shifted" either while in use or during manufacturing.......it was replaced (at no cost) and I never had the problem again.
Had some extra time while visiting, so I had a Discount Tire in Plano rebalance my tires. Vibration gone and trip back (other than the snow in Wichita) was great. When I was pulling the car out of DT, I asked the tech mgr if there was a tire out of balance. He said all 4 were!
Been chasing a vibration in the shark. Thought is might be worn out parts and have been parts exchanging chasing the vibration. I didn't start driving the shark a lot until I had the timing belt replaced, which was after I'd bought new tires (same Bridgestones as I bought on the CSS) from the same Discount Tire. Will be going to a different DT for a rebalance since it very well could be they didn't get them balanced correctly to begin with. Occam's razor.
I would make sure they are doing "road force" balancing and at the some time I would have them check to make sure the rims are all straight. When I got my 911 I noticed a very slight shake at high speeds, and it turns out all four rims were out of round. Got them fixed and now the car is smooth as silk. Had the same issue with the 2001 Boxster S
