[GreenV8S]

quote:im geting a high piched whining niose from the rear of my 93 400 (40kmiles} not unlike a hairdrier on low most noticeable when roof is on do they all do this ? or is my car about to eat another gold bar

Could be the diff, or the gearbox. It would be pretty hard to tell where it is coming from accurately enough to tell the difference. 40k is quite early for a diff to go. But if you're getting a warbling/whining noise that varies with speed and acceleration, the diff would be a definite suspect. The good news is you should get plenty of notice, and it will get really really obvious before it finally grinds to a stop. Definitely worth mentioning it at the next service though, if you don't do anything about it before hand.

Cheers,
Peter Humphries (and a green V8S)