Gearbox Breather ... ?

[Duckworth]

On the front seal problem of a G28 /13 gearbox - I did a few other checks and noticed that when I put a skinny screwdriver near the front seal and pry a bit - you hear compressed air escape for a few seconds....

So I looked around and there is no breather that I could notice - however there is a red plastic cap at the top cover which is an airtight plug of some kind only. Then I did a brief search and this came up :

"...If you are constantly changing gearbox oil seals, check the gearbox breather for plugging. When breathers become clogged, internal gearbox pressure can build and find its way out through oil seals creating a false impression that the seal has failed. This can become more problematic during summer months."

There clearly is no breather on my gearbox - and the thought now is whether to add one or not......exchange the red plastic thimble with a brass oval piece that permits tiny pulses of air through it.



_______________

'80 928

[MPDano]

Whoa, interesting. I wonder where this breather is located. Auto or Manual? Or both? Anyone got a diagram?

[vilhuer]

Red breather is wrong. It should be black unless factory has changed color recently.

[ice-hot]

I have a "80" 5-speed sitting in shop now (trans. is out) and the breather has a silver cap on it.
Have never seen a red one but have not worked on "84" or up.
Sounds like PO might have removed it and just plugged the hole.(for what reason who knows)
You need to put a breather back on it though! Going to the shop today, will see if it looks like it can be done with trans. in and get back to you.
John

Sorry, see you have it out of car.

[ice-hot]

Here is what you need from P.P.

http://www.pelicanparts.com/cgi-bin/smart/more_info.cgi?pn=OEM-92830131101&catalog_description=Genuine%20Porsche%20Part%3A%20 DIFF%2EBREATHER