Ok so. I have a 14 Mustang gt 6 speed 3.73, to my understanding , the car had 4.10s. But we?re taken out. The rear has had a whine ever since I bought it. I got the rear pinion bearing done under warranty, and had the ring and pinion done under warranty.
The noise is very clear just cruising at highway speeds 50-80mph. Very clear while coming to a dead stop . Also very clear cruising at 60-70mph , here are 2 videos of 2 different noises this rear is making. I?m stumped at this point .