My worse fear just came true. Called the AA out today turns out we couldn't even tow the beast as the wheels had locked up. Eventually after about an hour we got her to move under her own steam. Took it around the block and what a beautiful tune the transmission played (Clunk,crank), then when I selected reverse bang then she moved slowly. AA Conclusion NEW GEARBOX!! Managed to track down a 70,000 miler for £500 with a years guarantee, So busy weekend coming up.