After about a year of autocross in my new 06, it started making different whines too. Just remember your car is under a lot of stress, you're pushing it pretty hard and it's gonna make crazy noises, especially under all that heat...the heat is the biggest enemy. I think my turbo actually started whining too...or it could have been the tranny...but it was definately in second gear that i heard the whine. I wouldn't worry about it...ask Alizarian...he beats the hell outta his 04 wrx (during autocross ) and he's still got the stock tranny. Next time, take extra water you can spray on the IC and tires...it def. helps....