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cap comes off with pliers and plenty of twisting etc. running pipe is easy make sure you get hose that is a big diameter as i brought stuff too dskinny and ended up filing the breather to make it fit. works a treat now

If you suspect water in the box dont leave it in there. Rusted gears dont work so well.
you can take a small sample from the drain after it has sat overnight and drop it on a hotish stove element. If it hisses there was water in it.

And if it comes out all grey and yucky its has water in it too..

If i get time tommorrow i will take a pic of my spare gear box. from the 3.1 motor..And the gear box from a 2.8..
....Just to show the differences...and the breathers..

Thanks guys, yeah will give it a go with some more force haha. Yeah last time the bottom few hundred ml came out milky, and I have been through lots of rivers and bogs and sometimes its quite hard to get into first so I do want to get the breathers sorted and change the oil again.

Ok. I have popped off the passenger side one (drivers side one is bloody hard to get at with pliers at the right angle and if I am sure about what im goign to ask next then I might just dremel it off).

So they are spring loaded. I put my finger in the hole and it appears that it doesn't open. Moving the shifter around there maybe a small gap? but I dont have fingernails so I cant catch an edge to tell.

Mudslinger, do you understand how this works? If I get a large enough tube (havent measured but probably 15mm) and put it over the opening is it still going to breathe properly without the spring loaded thing in there?

Thanks!

there is no spring the cap just lifts up with pressure and underwater the cap floats hence why water gets in. with the cap off its just a hole into the gearbox

There is a spring under the cap though? And if I put my finger into the hole it is solid metal at the end...

when i took my caps off no spring flew out

I wouldnt say it flew out, but there were springs behind the caps. Did you put your finger in the hole? I swear it feels just like a dead end...