Analysis of Vibration
WARNING: This page is about a different car, the 2007 Lincoln MKX and 2007 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
Few vibration conditions are caused by the rear drive axle. For a vibration concern, follow the diagnosis procedure in NOISE, VIBRATION AND HARSHNESS unless there is a good reason to suspect the rear drive axle.