I have a series III SWB. When I let out the clutch there is a clunking type noise. It doesn't do it every time. I have checked the prop shafts and they appear sound. A new gearbox was fitted two years ago and the clutch checked then. Any ideas would be much appreciated. I am currently in Portugal and due to drive it back to Blighty in early July so I don't want to arrive home on the back of a low loader!