Gear oil fill plug?

[Puggers]

Is this the filler plug for the transmisjon?

tmp-cam-33872792.jpg

Picture taken at the rear of air filter.

[Puggers]

...and why is it so dirty of oil?
Is it a breather?

[dirtydirtydiesel]

Looks about right, not 100% from the poor picture & dirt
You want to use the gearbox breather,
It's a black plastic screw in plug on the top of the gearbox with a clip on black plastic cap.
It will want cleaning before you pull the cap off,
It is located on the top of the gearbox underneath the air box (on a diesel anyway)
If you have drained it, nock 200 mls off the capacity, due to oil trapped inside the gearbox.
On the later diesel engines there's no level hole , so you have to drain it & refill with the correct amount
The reason I said to drop 200 ml off is because when I replaced my clutch I removed the gearbox having drained it,
Only to find another 200 mls in when the box was tipped up
The capacity on the diesel box is 2Ltrs
Hope this is of some help DDD