Do i need to extend my diff breathers??

[martyrsvr]

When going off road should i have extended diff breathers for when im going thru rivers deep puddles etc?
had a look and can see a small brether that sits on top of my rear diff ,took it off and had a look , it has a small spring and plastic cap just wondered if submerged under water which it will be at drumclog in a few weeks will water get in to the diff ??
or should i find some tubing and extend the breather??
also does the front diff have a breather had a quick look but couldnt see??

[stormforce]

if your going to be doing alot of off roading then it would be advisable to extend the breathers.There is also a breather on the front but it is tight to get to if the truck hasn't been lifted.There is another on the gearbox also

[Slugsie]

If you are going to do a lot of wading then it's sensible to fit some breathers. But if you're just going to drop in occasionally, then it's not necessary.

There is a breather on the front diff. It's on the top left (as from the drivers seat).