If you haven't had your gearbox oil done then it really needs it every 50k or so. You really want to get it done asap.
I know bad oil can lead to funny auto box issues like slow changes etc.
If you are around Manchester, AwesomeGti did mine for about £180 or something and put all the clutch adaptions etc in. Did a cracking job and even though its only done 60k miles I was really surprised at how much smoother the gearbox worked after that service