Transmission, Suspension, Brakes, Tires & Wheels
I have a '90 568 that has a slight but annoying whine only in 5th gear when lightly loaded. If I am going slower than 25 mph or faster than 60 mph, no noise. I can run in 4th or any other gear at any speed or load and get no noise, so I'm guessing it is related only to the 5th gear area...