DOHC-Vtec

I dont think its that big of a problem but then again it could be. But my motor is a d16z6 with the stock transmisson. Every time I down shift into 3rd and 2nd the trans make a whine noise. In 3rd its not that bad but then going into 2nd its pretty loud. I have no clue what this could be, the trans shifts fine and it doesnt grind. I dont know what this is but its really annoying. So if anyone could tell me what this noise could possible be that would be great.
Thank you,
Matt