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Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHHelp please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Leading reported evidence

Check output shaft covers

Suggestion or failed attempt

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 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
Check the output shaft covers.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

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Leading evidence: 'Check output shaft covers' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check output shaft covers' (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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1 matching discussions · 5 captured posts examined · 0 partial discussions

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Check wheel bearing play

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
Also check for wheel bearing play.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check wheel play, you don’t want

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

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Suggestion
Try jacking up the car and checking for wheel play, you don’t want to push failing wheel bearings too far on these cars.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use tapatalk

Suggestion or failed attempt

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
Sent from my SM-G930T using Tapatalk
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace trans fluid

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
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Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt · Original poster
Recently changed the trans fluid with Porsche fluid and no change.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Frequently discussed actions (5)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Check output shaft covers

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
Check the output shaft covers.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check wheel bearing play

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
Also check for wheel bearing play.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Check wheel play, you don’t want

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
Try jacking up the car and checking for wheel play, you don’t want to push failing wheel bearings too far on these cars.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Replace trans fluid

No successful repair reported for this finding.

0
Reported fixes: 1
Unsuccessful attempts: 1
Discussions

Read evidence and context

Discussions that report an unsuccessful attempt: 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.

Unsuccessful attempt · Original poster
Recently changed the trans fluid with Porsche fluid and no change.
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 986 Forum - The Community for Porsche Boxster & Cayman Owners

Use tapatalk

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
Sent from my SM-G930T using Tapatalk
Original post Read captured discussion
Help please - Grinding sound from transaxle while reversing - 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.

5 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: 20261026T222516Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

I have a grinding sound from the transaxle/drive train when reversing. It’s cyclic (grind, quiet, grind, quiet...) and varies proportionally with my reversing speed. It’s done it ever since I’ve owned the car. Recently changed the trans fluid with Porsche fluid and no change. I didn’t find any metal in the old fluid and the correct amount drained out. No problems shifting, no noise in forward gears, no vibrations, no cv clicking. It’s not a rock in a brake shield, nor a problem with the e-brake. I just put on new rotors and pads, so I know everything’s clear for the brakes. 107,000 miles on the car. Any ideas???

POST 2Original post

Quotes source post: 574807

Jack it up, put it in neutral, spin the wheels one at a time (by hand) in reverse, and see if you can hear it then. That may allow you to get closer to the sound. Sent from my SM-G930T using Tapatalk

POST 3Original post

Check the output shaft covers. When I used to autocross my car (hundreds of clutch drops with track tires) I ended up cracking one of the covers. Oddly it didn’t leak but the crack created an edge for the drive axle to grind on. Oddly I now I have a new grinding with a different transmission 5 years later. It only grinds going forwards and doesn’t grind when the wheels are up in the air. Probably once again a transmission problem. The 2.5L transmissions aren’t great for taking abuse

POST 4Original post

Also check for wheel bearing play. Try jacking up the car and checking for wheel play, you don’t want to push failing wheel bearings too far on these cars. The aluminum hubs are soft and the bearings can spin in the hub when they fail, if this happens you’ll need a new hub as well as a bearing.

POST 5Original post

Long shot, but my grinding noise was related to ebrakes. I had put on the ebrake after a track session and the pad stuck and dammaged the rotor. The gap between rotor and hub is not a lot and if there is wheel bearing play that might be rubbing.

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