whining depending on when it is happening could be syncros...or could be a particular gear...or if doing all the time while under load be it on or off throttle could be either the front or rear diff...

 

Meh, I wouldn't worry. In my '05, 1st gear was kinda loud especially at higher RPMS. But 2nd gear was very loud throughout the gear(similar to a supercharger). I wouldn't worry about it, as long as it's shifting fine and not making any grinding noises you should be good.

Edit: do the '06+ have 5 or 6 speeds?

 

I'm doing some video searches of 2nd gear pulls...aside from the outside noise, you can hear 2nd gear 'winding up'

YouTube - Stage 2 Saabaru 30-60 2nd Gear Pull

You could hear it REALLY good here, he'll even let you know when he goes into 2nd gear :

YouTube - Frank 50 with EWG WRX 2nd gear


Keep in mind, the Cobra guy may not know that 2nd gear in a WRX is noisy like that. I could see where he would compare the sound to a supercharger.

 

Ok cool. I do mainly hear it in 2nd and I was in 2nd all day at the track. The car feels fine so hopefully it is. lol

 

maybe it was ur turbo or supercharger

 

Yeah, M. Your car was running out of boost fluid.

 

 

I highly doubt thats a stock tranny as it sounds exactly like my wagon (EWG and SC gearset).

 

While that is probably true, I just used that video to reference what 2nd gear sounds like in a WRX. Stock or not, it sounds at least similar(maybe not as INTENSE). I vividly remember the distinction in sound that 2nd gear had versus all of the other gears...I grew quite fond of the sound actually

 

Its probably just a combination of auto-x stresses and the diffs. Cassie's STi whines pretty good under hard braking in 2nd gear, at least from the outside.

I don't know what mine does, actually. I know I have quite a few bushing squeaks (if anybody remembers Paul with the black STi, it sounds just like his car did) but I don't even hear the radio if I leave it turned up while running the course.