2010 g37x with 135k. I get a gear whine, which sounds like a supercharger whine, at around 85 mph. I checked the driveshaft and it seems tight. Carrier bearing? Any thoughts are appreciated if anyone experiences this, or if it's normal.

 

Which front side?

Check your wheel bearing...

Does it whine when you let off the gas pedal?

Here's my Q40 awd manual mode and it whines when I release the gas pedal..


You can hear the tranny whines after that beep from my Waze app telling me I'm 10+ over the posted speed limit. If that is the whine sound you have , it's normal.

 

It is not my wheel bearing. I already had that issue with the front left so replaced them both. It is a different sound. It sounds exactly like a supercharger whine...more center of the car engine bay area. It happens when accelerating ( foot on the gas) around 85. I usually don't drive this speed but heard it the other day so kept accelerating from 75 to 85 to try to figure it out. (No traffic at 3am). No police hiding out that night so thankfully I did no have to explain what I was doing.

 

Definitely normal. I heard that when I go that fast on my Q40 awd.