Last Night i was getting on the Highway and i was punching it well when i got the RPM up high i heard a whistling sound. So i slowed down and shifting and i continued for a few more seconds just wonding what the problem might be?

 

Where did it whistle from? I had a similar problem when I bought my first car back in '94. The whistling was coming from the driver's side mirror - it was more pronounced when I had my window down. Afterwards either I stopped driving that fast or the effect just went away. Try to pinpoint the location of the whistle - it may be nothing.