I get a kind of noise or bad vibration from under the car, around the back
of the engine area, or front of the gear box, and it happens after going up
long hills, or just giving the car a bit of stick. I've tried to get Ford to
sort it out, because it's been there since new, but they can't find anything
wrong. I've even thought maybe the catalytic converter might be shagged. Any
suggestions would be very welcome.

Bob