: Front end humming noise

10-24-12, 12:16 PM
I have a 2009 STS AWD and I have been chasing down this humming noise and just can't figure it out. Hum seems to get louder as I come to a stop. It does hum when accellerating as well, from about 10mph all the way up to 40mph is the most noticable, it still does it around 60mph but I think it's just harder to hear.

I've replaced both axle shafts, and both front hub bearings with no luck.

Wondering if it's my tires, I have custom wheels and tires on the car and don't have the stock wheels anymore, so I can't swap them out to check.

Also wondering if it could be in my front differential?

Any suggestions?