Howling/Whining Noise.

[1slowdsm]

(update)I thought this noise was coming from my tranny or transfer case being low, but I changed the fluids and stuff and the noise is still there. I even used the K&N air filter cleaner to clean my filter and the noise went away for about a day and then now it's back. It only sounds when I'm moving and I'm on stepping on the gas. I've tried to rev it up, but no sound. Went to neutral and let it cruise but no sound either. I wonder if it could be my stock bov leaking a little, because when I'm at boost and switch gears it'll sound exactly like the bov with the whining noise. I just hope it isnt my turbo going out.