The easiest way to find out, is play with the throttle. On very light throttle it should whine at about 90kph, but when you back off it should go quiet. That was the symptoms for my whining diff anyway, and they replaced it, no questions asked. Because youre so old, you may have trouble hearing it. If you do, let me know, and Ill take your car for a drive and find out. :lol: :lol: