Last night I started hearing some kind of a whistling noise coming out either from my clutch or engine when I change to 2nd and to 3rd gear on high rpm's? Anyone knows what that noise is???

That's a new one to me but I can come listen if you want.
-hype

hmmm i've had that in my car... though i dont know if its the same...
I had a whistling sound... it came out of my speakers... it happened once the revs got above 2500... it was because my speakers werent grounded properly... thats what i remember... Volvos had that problem too i remember
oh wait... if its not that... i think i had some whistling when i was doing 4000-5000 shifts a coupla nites ago... i have no idea if its what you're talkin about...