Thanks for the adivice guys. It was definately coming from the t/box as the noise faded the closer I got to the main gearbox and engine. Keith, I think your right, found fresh oil on the casing and as the previous owner was a complete muppet when it came basic maintainence (the current one also for not thinking to ask about it) I would say it's been leaking for a while and run dry.
Now for a few questions:
1 - Is this something that can be changed on a drive?
2 - Seeing as it's possibly run dry, will it be salvagable or would a replacement be a more viable option?
3 - Who like bacon buties, tea/coffee and beer tokens :biggrin1:
mick