If I remember correctly in your facebook video, are you referring to the REALLY high pitched whine? Like 4000 and 7000Hz and more of a sine wave tone than a whine? Plenty of test tone videos on youtube to compare if you don't have a tone generator/app. I was thinking about this while cruising back from the Ford Nationals yesterday. I was enjoying the new mufflers so I didn't have music playing and I could hear it in the car. Very subtle and easily washed away by road noise if anyone was near me. I noticed I could get it to step up and down with little taps of the throttle (it changes in a couple incremental steps, so not pulley whine). It's been there and constant in the 6+ years I've had the car (2002 V8)
I had an idea - what if it's the hydraulic pump solenoid vibrating with the PWM signal? Maybe something about the PWM control scheme of the alternator? I think the solenoid would probably be a steady 100Hz tone of varying sound since its a 10ms fall time signal, but both of these parts are unique to gen 1 and could explain why so few know what we mean. I do find it interesting you didn't notice it on your gen 1 V6.
I'll try to take a ride with forscan and watch the gen(erator) and fan PIDs to see if one changes with the tone. Maybe the aux pump? Or I'll have to poke around with a stethoscope
