Analysis of Vibration: Notes
WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
Few vibration conditions are caused by the RDU. For a vibration concern, follow the diagnosis procedure in NOISE, VIBRATION & HARSHNESS unless there is a good reason to suspect the RDU.