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911uk

Gearbox pressurised?

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YOUR RESEARCHGearbox pressurised?

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1 matching discussions · 10 captured posts examined · 0 partial discussions

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

  • 911uk: 1 discussions

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Generation: 20261026T105141Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Slightly odd one. Reverse light had stopped working, bulbs all good so bought a new reverse light switch for the gearbox. Reverse lights now working again, but when I undid the old switch from the gearbox casing there was a definite hiss of air escaping from the box. Is it possible the breather has failed somehow and would this cause the internal volume to pressurise? I can't see this being normal and obviously keen to not blow out a seal.

POST 2Original post

Didn't know they had a breather :dont know: I would've thought they are reasonable air tight as the oil stinks if its quite old and doesn't 'arf wiff when drained.

POST 3Original post

There is a breather on the top of the box, just a basic thing that lifts up under any kind of pressure, mine is slightly corroded but still moves easily so maybe something to look at?

POST 4 / ORIGINAL POSTEROriginal post

There is a breather up there I'll see if I can give it a wobble. Might have bashed it fitting the box I suppose.

POST 5Original post

Just looked for the part number for the "bleeder" as it is called 99630107100, £4.20 ish, I have never removed mine so I'm not sure how it comes out

POST 6 / ORIGINAL POSTEROriginal post

Thanks, it does as you say look a total arse to get to.... Will report back.

POST 7Original post

The breather is pressed in and located way on top of the gearbox. Could be impossible to change in situ.

POST 8Original post

The bleeder is just to the left of the slave cylinder, there may be just enough room to get a lever in to lift it out? Item 2 in the diagram.

POST 9Original post

Let me know if anybody wants a photo of it. MC

POST 10 / ORIGINAL POSTEROriginal post

Thanks for the offer mistercorn - if you could have a poke at it to see if it's possible for it to become jammed I would be grateful! From memory it's just a loose plastic cap in a hole...

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