WHILE DRIVING 30 MPH, THE VEHICLE JERKED AND VIBRATED UNCONTROLLABLY. THE DRIVER WAS ABLE TO MAINTAIN CONTROL OF THE VEHICLE AND PULLED OVER. THE VEHICLE WAS TOWED TO A BODY SHOP. THE MECHANIC INFORMED THE DRIVER THAT THE UPPER AND LOWER BALL JOINT WERE BROKEN AND NEEDED TO BE REPLACED. PLEASE PROVIDE FURTHER DETAILS. *JB THE CONSUMER SWERVED TO AVOID HITTING A DEER. AFTER SWERVING THE LEFT FRONT OF THE VEHICLE FELL TO THE GROUND AND CAUSED THE VEHICLE TO SLID INTO A GUARD RAIL. *JB