I've been noticing a very softer high-pitched whistle that seems to accompany the transmission, especially when I'm accelerating and up-shifting. I don't remember exactly when it started, but I'm conscious of it and hear it almost every time I drive the car.

Does anyone have any idea what this might be coming from and if it indicates something wrong?

 

If you have an intake, that's more than likely what it is..

 

Happens even with stock intake.

OP- Look up Honda Whistle....very common and nothing to go crazy over. Mine has done it for over 3 years now...even after a full teardown and rebuild the sound never went away. Basically it's just how the air is passing through your throttle body. Nothing to worry about.

 

Very very common.

Even though there is no problem, one day someone will come up with a fix. I'd imagine lots of thinking, then 5 minutes worth of work.

 

The car is pretty much stock. No changes to the engine or any connected parts, only an upgraded audio system. I notice it because it wasn't there for the first three years of ownership and I wondered what was causing it.

Thanks for answering my questions. I'll drive a little more confidently now, knowing that it isn't a catastrophe waiting to happen.

 

I have had this whining sound from my transmission/diff area during acceleration for the past 45-50,000 miles. Cant figure out what it is...

 

my talon did that when I had an exahust leak... It was small but it was like a whistlin dixi...lol

 

I noticed that I get a whine when I slow down quick for a speed bump.. not sure if it's a similar problem

 

^ i get a whine or a whirling sound when i slow do too. normal? just changed my dif fluid ~200 miles ago

 

I get the whine too and also just changed my diff fluid, it made no difference. I've come to the realization that this car just makes lots of strange noises sometimes, but that it's normal.