Hey cruzerchris,
Welcome to the Forum! You might check the air box just to make sure it is secure, and the air intake hose is secured well. Their are three plastic silencers that keep the Turbo whine quieted down. One is in the Air inlet hose, one is a big white plastic doughnut looking thing located in the air box under the air filter, and the third one is in the hose leading to the Turbo itself. I would think those three areas would be a good place to start at least. Their are a couple good tech guys that hang in here pretty regular and can probably offer some more advise if that does'nt work for you.
Also, if you don't mind me asking, what serial number is yours, and can I get you to maybe post a pic, and a bit about yours? My 03 Dream is #0377, and I have been working on kind of putting together a bit of a Registry to see if I can track as many 03 Dreams as I can. Here is a pic of mine.
She is kind of a bit modified, but still a Dream.
Anyways, the other guys should chime in before too long I recon.
Go easy, and I hope to see you around.
Candyman