If it helps any1 locate the problem then there has been a whistling/whining noise coming from I thourt was the gearbox! This morning it made the same noise but as I pulled away the noise got loader an loader an at the top end of the gears it turned into a rattling noise as if I had a cage in the back then a it made a noise asif the cage had fell over then stopped again when I changed gear untill I got to top end of that gear too but it felt and sounded ok at bottom end of gears
an maybe now I've got a good reason to blah the ball an chain for 1 
