I was wondering if anyone could offer me some advice - on our 1.6 Zetec we have recently bought, we've noticed a leak on the underside of the gearbox. It's on the main joint on the bottom of the box, almost like a seal has worn.

Can anyone offer any advice on what it could be? Are they prone to leak here? The car's done 98,000 miles but seems like it's been well looked after.

I've taken it back to the garage once as it's still inside it's month warranty and they cleaned it all down but it's started to appear again now, but not as bad.

Thanks.