I have a 2004 g35x, so i noticed like a week ago that my G was making a very loud whine/humming noise while accelerating. usually occurs after 35mph and gets louder as you go faster.

I know its not the tire feathering thats causing the issue, maybe its the awd system which is the differntial/transfer case? Its not the wheel bearing because i tried turning sharply towards left and right but still same noise./

If someone had simialar issue and resolved this please help me out. The noise is really annoying and its embarrasing having someone sit with me and its really loud, i usually have to turn the music up

 

I have the same problem with my 04 coupe. The whining noise is coming from the front passenger side. I upgraded my tires to Michelin super sport but the whining still there, it's not that bad to the point it's bother me but it's annoying when you know it's there. I'm checking into my ball bearing.

 

You probably have a wheel bearing issue and it'll get worse with time.
I think maybe my differential is bad :/ its expensive to swap one out too. Idk, i hope its not it tho, maybe needs fluid in it

 

Try to change the differential fluid see how it goes. Keep us update bro

 

it turned out to be a bad wheel bearing. Put new one in and my G was running smooth again. Sorry for the very late reply.