Gearbox oil

it's fairly easy, not the standard gear oil either, make sure you can undo filler before draining, then you know you can put oil in and also allows to drain quicker, sure there are pic's on here have you done a search for it
 
It is possible and there is a very detailed How-To in the relevant section.
Make sure you can undo the filler plug before you undo the drain plug.




Not so slow this time Tony.;)