My car has developed a loud whining noise at almost exactly 50 mph. Given I travelled the A420 Oxford to Swindon and back yesterday (50 mph enforced by large articulated lorries) it is really sttarting to be annoying. It seems to occur in any gear.

Any ideas of the culprit?

 

I had something similar, turned out to be the middle diff rear bearing, had it done on warranty.
ken

 

My is a MY94 so no chance of warranty!!!