Due to a design issue with Dodge Ram front differential and suspension, some owners may experience a vibration in the front end when in 4x4 mode, or a violent shaking vibration of the front wheels when going over a bump at speed. These two symptoms are often called a "death wobble", but actually appear to be two different problems with the Ram truck. The 4HI mode vibration is a vibration or shudder that occurs when accelerating in 4x4 high mode. This affects Dodge Ram 1500 non mega cabs; Dodge couldn't discover why their stock trucks would do this for some customers. The solution for Dodge was to state that there is no problem and that all of the new Rams will shudder or shake when in 4x4 high. This symptom appears isolated to 2006-2011 1500 non-Mega Cab model trucks and when in 4-hi mode. It is ReadyLift's position that if you have installed a lift kit onto your Dodge Ram truck and experience either of the two symptoms mentioned, (1) IMMEDIATELY HAVE THE LEVELING KIT REMOVED FROM THE VEHICLE or (2) install KORE High Angle CV Joints that will fix the factory issue.