Hi all wonder if you can help? We have had our disco for over a year now and spent the best part of four grand just keeping it on the road, new gearbox, ACE system diesel pump.... It has now started to make a noise like a fan belt slipping, trouble it it's intermittent and a certain rev ranges - over 50 it disappears, our trusty mechanic thinks it might be something in the gearbox but it makes the noise if you are standing still. Anyone got any suggestions before I take it and my credit card to the local independent specialists?