Right I've changed the Clutch so lost some oil from the transmission end casing.
How do you check the level?
Assuming it's the plug on the Off side of the Diff.
I can't get at it with the car on the ground, and with it on ramps oil pours out.
Does that sound over full?
How do you top up the F20? there's no breather as mentioned in the Haynes manual.