A VIBRATION/SHAKE MAY BE FELT IN THE SEAT AND/OR FLOOR AT SPEEDS ABOVE 50 MPH (80 KM/H) AND PEAKING NEAR 65 MPH (105 KM/H) ON SOME VEHICLES. AN 'AFTER SHAKE' CONDITION MAY ALSO EXIST WHEN DRIVING OVER A BUMP AT SPEEDS LESS THAN 45 MPH (72 KM/H). INSTALL NEW DESIGN LH AND RH ENGINE MOUNTS AND REAR AXLE-TO-FRAME LATERAL SHOCK ABSORBER.