It changes in pitch with speed. I hear it mostly at speeds above 55, and it changes up in pitch as you go faster.Is the whine at a certain speed? A light foot on the gas and leaves when you let off the pedal and comes back as soon as you touch the gas? If so, it is the rear. I had that on a 2002 Frontier.
I am hearing a high pitch sound around 8.9Khz. Mine seems to be coming from behind the dash/engine compartment. It comes and goes. But it really gets my ears to ringing and I can't get any relief - even hours after being out of the truck. If I crank up the stereo it just masks it.Wrong kind of whine, timing chain tensioner would be more of a growl similar to that of a supercharger. This is in the 8Khz+ range.