Anyone else detecting some whine on the overrun? One of the ways I can get the car to do this is to get the car up to 28mph, stick it in 4th, then let the car overrun through engine braking. There is a whine as the car slows down between 25mph and 21mph. Haven't yet determined if it's coming from the rear diff,or the gearbox itself. Anyone else heard this, or care to experiment as above?