Whistling/whining souns beneath back seat
My car has done nearly 110K miles. Lately, I'm hearing a whistling/whining sound from under the back seat from 50mph upwards. Over the months, this sound has increased gradually. Recently, I had the oil in the differential changed, but this has had no positive effect.
I would appreciate to her your ideas about what causes the sound, and what needs to be repaired/replaced.
'01 DT41 - M54 - A5S 325Z - 482