Whining noise

[KingJmart]

Somebody plz help with this problem!!

So I have a 2008 2WD chevy Tahoe LTZ with 75,000 miles and been having this annoyingggg humming noise that occurs when I get about 25 mph and picks up as I go faster. Sound is most noticeable when I get up to a good speed and completely let off of accelerator! Also when I let off of accelerator and shift into neutral will still driving the sound goes away! Wtf! Lol I have rotated tires, changed out rear diff fluids and gasket, and did a complete transmission flush at the local car shop and added new transmission fluid. Butttt sound is still there!!! Ughhh! Looked into changing hub assembly but not thrilled about throwing more money away unless it fixes my problem. I checked the driveshaft and joint and seems to be no play in the drive shaft when I'm park. Has anyyyyone had this problem and what will resolve this noise problem that's driving me nuts

 

[Goodinblack]

What did the old differential fluid look like when you replaced it?

 

[KingJmart]

Diff fluid looked alright. Nothing wrong with it. Was dark like oil and a little metal shavings nothing major just normal. But was replaced with new fluid

---------- Post added at 10:33 AM ---------- Previous post was at 10:31 AM ----------

Ordered 2 front hub assemblies online that I got at a discounted price. So if that doesn't work then I'm out of ideas......

 

[fiatdale]

Sounds like your rear end. Have a rear end guy take a look. (That was not meant homosexually)

 

[KingJmart]

Rear end problem such as what?

 

[KWIKNVA]

Hmmm, A hum would suggest a electric noise that you would get from the radio. Do you have a aftermarket radio or amp installed? I'm no audio installer but could be feed back from the alternator through the speakers if it's a hum. Do you still hear the noise with the radio completely off?

 

[KWIKNVA]

A rear end would make a "whine". if you hear a humming sound then it could be electrical. Try turning off your radio. I have an Alpine in my sierra and it will hum and change pitch with the rpms. Even if the volume is cut low. I turn radio off no hum. Also I recall a friend with tires that hum due to his directional tires on backwards. My last guess would be a wheel bearing. My wife's MDX sounded like a truck with 44's when we bought it. We had to replace the front wheel hub.

 

[KingJmart]

Yes still hear it with radio turned off. Deff nothing to do with audio or aftermart radio. I have stock radio anyways

 

[eqppwqqep]

Sport shift and see if it is still there...manually move the PRNDL

 

[eqppwqqep]

Seriously...sport shift first and try tow mode and see what happens. Does it go away if you tap the brakes while cruising?