Yes I did that too! You just have to drain a bit off, dead easy to do, there's a bolt in the sump of the gear box all you have to do is undo it....... if you don't want to lose all you oil just undo it until it starts to drip and wait until it drops to the right level, this can take a while, you are better off just undoing it and letting a bit pour out and then refit it, although when I have done this I end up losing most the oil as in the panic to try and get it back in I never seem to be able to get it back in quick enough :doh: put some newspaper down first to catch the oil your container missed! and wear some latex gloves!