So I've been researching this for a couple weeks now and have come across a lot of information scattered across the board on multiple forums. I have a 2014 GT500 with svtpp. The diff on this car whines, and it's super noticeable. It does it mainly between 40-60 mph and is loudest at cruising speeds while you're in the gas (noise fades away when you're decelerating). To me personally, this noise isn't normal. While I haven't owned a GT500 I've never had any drivetrain noises in any of my mustangs. Ford states this is normal, however a ton of people that own these cars claim their car is dead silent and has no gear whine. However it seems like an equal amount of people I've talked to say theirs have the same noise and they stopped worrying about it since Ford said it's normal. Then I've read info that Ford has replaced ring and pinions due to this noise. In other words, it's conflicting information. How worried should I be about this? Does anyone have a similar issue? Does anyone have higher miles that has had a whining rear that hasn't had any major issues? Just looking for some feedback and advice from 13-14 GT500 owners. Thanks.