'08 Whistle??

I got to put 2K miles on a '08 F250 Crewcab Long Box 4x4 this past week and to be honest I'm in love and I want one BAD!!! BUT...wheres the Turbo Whistle?? I noticed that when in town, starting from stop Light/signs that it would get like a hum sound in the back of the cab area that almost sounded like a whistle, does anyone else get that and is that Turbo Whistle?

was it stock...they dont whistle much stock...but if it has a delete pipe then it will whistle alot more, not to loud but you can def hear it

VGT and the little turbo makes um quiet

VGT would make it super loud if it had a 10 blade turbine wheel... But if it has a catalyst and a filter you loose the whistle.

Its a All stock, 3200miles when I took it