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Trans troubles, 1st galling

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YOUR RESEARCHTrans troubles, 1st galling

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Clean when i drained it

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Unsuccessful attempts: 1
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Suggestion · Original poster
The gear oil was clean when I drained it.
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Trans troubles, 1st galling

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Leading evidence: 'Clean when i drained it' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean when i drained it' (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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Clean when i drained it

No successful repair reported for this finding.

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Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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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 · Original poster
The gear oil was clean when I drained it.
Original post Read captured discussion
Trans troubles, 1st galling

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3 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

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Generation: 20261026T144035Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Looking for help identifying the cause of damage to the gears on my transmission. This is a Porsche G96/31 with 105K miles out of a 2003 C4S. I do not know the service history and I did not change the fluid since I got it. I put 10K miles on it with hard driving at autocross and track days. Symptoms of problem was a loud clicking noise only audible in first and reverse gears, no issues shifting or staying in gear. Inspection reveals a lot of galling on the input shaft 1st gear and minimal on the 2nd gear teeth, the mating gears and bearings appear in good condition with some wear but not abnormal. The gear oil was clean when I drained it. No big flakes on the magnet, just dust and sludge. My assumption is the gear oil was either the incorrect type or not sufficiently rated for sever duty imposed by the track driving and caused overheating or cavitation on the first gear. I want to prevent this from happening again on the replacement. So what do you think?

POST 2Original post

Confused that the symptom was "clicking" but the only damage is galling. Suggests that there may be undiscovered damage. There are a few gearbox experts who drop in occasionally - GTGears & Eric for example may opine? It is such a specialist subject that few among us (inc.me!)have enough useful knowledge to help you. Suggest you call CMS and GBox just ask them https://californiamotorsports.net/co...boxes-for-sale http://www.gboxweb.com/

POST 3Original post

Another vote for contacting GBox - after reading the rebuild DIY that someone else posted, there's no way in hell I'm opening up the transmission. I am far too inept to successfully pull that off.

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