I have noticed over the past 4 months or so that my car has developed a loud whine when going above 50 or so. You can hear it best at 60mph. I'm also having tranny problems so that could be the issue but I think it could possibly be the diff. Has anyone else experienced this or have any advice?

Thanks
-B

my 5at is making a whine also. idk what it is tho.

Could be your differential going.

One thing i forgot to mention was that I hear the noise regardless of whether the car is in gear or not (ie: if I engage the clutch i still hear the same noise). That doesn't necessarily mean it's not the transmission though. I'll have to do some troubleshooting this weekend.

might be wheel bearings, i have a whine once in a while at 120km/h i sure hope mine is wheel bearings as well not differential bearings, do u have a vibration?

Whinnning hmmmm your turbos are going LOL j/k j/k

No vibration, probably is the bearings. Sometime in the next month i will replace the bearings and see if that make a difference. I'll let you know...

-B

Did changing the bearings fix it? I'm having a similar issue, most noticable around 70MPH.

--brycea
2004 G35 Coupe 6MT

Any updates on this? My warranty is about to expire and I would like to bring this to the attention of a dealer in case it is a sign of something more serious. I have a 2006 6MT and the whine is most noticeable at higher speeds. If I put the tranny in neutral, the sound goes away, but even in neutral, if I rev the engine the whine comes back. Sounds electrical, like it could be the alternator/AC compressor or something dependent on engine speed rather than vehicle speed (like a diff, wheels, etc.). Not a serious issue, but it's annoying as hell on long drives and I want to ensure it's not going to become a severe problem.