to those who wanted to hear my sound when it was parked in my garage:
this is it -- i pointed the camera right where i was hearing the sound coming from:
vimeo.com
mind you, i realize it doesn't sound the same at first but as you are listening to it, imagine what it would sound like IN the car while driving vs not. Also, if having the vehicle in motion exacerbates whatever is causing this issue, then the two sounds can seem very related.
that being said, I will be showing both sounds to my technicians tomorrow. However, the stationary sound is one I cannot replicate, while the "cricket/metal lathe" sound is one I can.
Here is the sound we all know near and dear -- i get it around 30ish, then around 50ish it really kicks in:
vimeo.com
also what sucks is that, the noise is so high pitched that it sounds very apparent on my iphone (I believe because the small speakers on mobile phones excel at playing back treble/high frequency ranged sounds.) but on my computer with bigger speakers i can't hear it as well -- so i have to turn it up high. Anywho, its VERY apparent while driving and is annoying.