Mysterious Whine????

[YoungMT Hick]

Ok so i have been having this whine that comes in and out. I tried to narrow it down to a gear and havent been able to. I was thinking a boost leak or exhaust leak but i see no Blackening in the engine bay at all. Trans fluid is good, Engine Oil is Rotella T6 with about 4k miles on it. The whine will not come in unless i am getting on it a little. Cruising at a steady speed it doesnt come in. I dont know what it is and i am looking for some help. Any questons please ask. Might have to have your volume up to hear the whine. In the truck it is louder than you hear. Thanks

[Lilpooh]

Just throwing this out there. Have you checked the driveshaft carrier bearing.

[baycountry16]

Man, I have a noise that sounds almost exactly like that! That's crazy. I had posted the video below in another thread.
Mine seems to occur when letting off the accelerator or coasting at a slow speed. Honestly I haven't had my truck up to those speeds you were at since noise started so mine could do it then too. Not sure. Also doesn't usually happen until trick is up to operating temps.

Maybe we can both get an answer

What do you think. Think they sound similar?

Here is the link:

6.0L powerstroke noise coming from under truck while driving - YouTube

6.0L powerstroke noise coming from under truck while driving - YouTube

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