[White99]

Strong intermittent vibration that occurs usually at motorway speed (60-80mph) but not consistently. When it starts, you have to slow right down to about 40mph for it to stop. Doesn't seem to be vibrating through the steering, and I have had all 4 wheels checked for balancing. Front arms were worn and have now been replaced, yet issue continues and seems to be mostly in the chassis and rear. Anyone have any ideas about what this could be?