So, I've only had the truck for 4 days, 2011 3.7l V6, and I noticed something when I was driving with the radio off. When I start accelerating, or maintaining speed, I hear a very dull whine/whistle. The best way to describe it would be a CD being read in a disc changer, except it's constant. Until I decelerate, that is. Then it goes away. It's not loud, nor does it sound like much that's a cause for concern, but I am curious if anyone else has noticed this.

 

Starting to sound more like a spooling over the engine noise rather than a whining.