Nothing better that the joy of Oil Leak hunting.
 

Afternoon all,

Working on the car today and thought I would take a look at an oil leak that's been getting worse. Not driven the car much but it looks like I have a leak at the back of the engine, missing the under tray and dripping onto the ground.

Its stopping the sub frame getting too rusty I suppose!

Time to clean it all off and have a look where its coming from. Not sure if its gearbox but it looks like it or something at the back of the engine that's flowing down to there.

http://forum.a8parts.co.uk/picture.p...pictureid=1432

http://forum.a8parts.co.uk/picture.p...pictureid=1433

That looks like the left hand output flange - a very common spot for leaks. Can you identify gear oil by smell? Engine oil is not unpleasant, slightly petroly smell. By comparison, gear oil is a vile pungent stench which gets in your nose for hours. ATF is a bit fishy.

The usual culprit for engine oil leaks down the back is the valley gasket. It fills the V with oil which then dribbles out of a vent hole at the back of the bellhousing, down behind the flexplate and out of the bottom.