I have a leak on my gearbox / prop. Its dripping on to my exhaust and so i get the odd cloud of smoke every now and again and its clear from underneath the car that its been leaking for a little while. The drip is coming off the gearbox from in between the 2 front exhaust boxes. It doesn't look like its coming from the propshaft but its hard to say. I think its going to be a fairly big job.

Are there any common gaskets or seals that go? Any advice much appreciated.