Sound during gear changes

[RedZR]

I have an interesting sound in my 2008 when I change gears but only on up shifts. When I release the clutch to engage the next gear I hear a hissing or whooshing sound. Everything works fine, but it makes that sound.

My previous 2005 gt made the exact same sound from the day it was driven off the dealers lot.

Anyone know what this sound is? I am just wondering.

Thanks,
Dan