Originally Posted by dcorn
Helical gears are definitely quieter than straight cut gears, but still make noise. Check out a car with a centrifugal supercharger. I've had two different Vortechs, one with straight cut gears (V1) and one with helical (V2). The straight cut were much louder, but the helical still had a decent whistle to it. The noise is a little more extreme because the gears are spinning really damn fast, but the same factors apply.
The 'normal whine' is pretty damn loud if you compare it to a rwd or fwd car.
And the OP asked for people's opinions about a problem he was having, so we're giving them based on our personal experience. That's how a forum works. So go chastise people somewhere else.
So did both WRX's I test drove. So did mine, from the day I bought it, especially under hard acceleration.
I know how a forum works.
I suppose I take things literally as they are written. I understand the difference of suggestion and what the majority of these replies are. Half the thread is guaranteeing that it's normal without ever hearing it! A better reply would carry a disclaimer of "...but I can't hear how loud your particular case actually is, so maybe it actually is bad..."
maybe I give people too much credit? I assume that most people bothering to make a thread about gear whine after reading threads on it being common may actually be concerned theirs is different.
Sorry to to rub you the wrong way.