"SERVICE BULLETIN - UNDER CERTAIN DRIVING CONDITIONS, THERE IS EXCESSIVE VIBRATION BETWEEN 30 AND 65 MPH. FOR 2WD AND 4WD VEHICLES, THE CALIBRATION VCM OPERATION COMBINED WITH THE ACTION OF THE LOCK UP TORQUE CONVERTER CREATES EXCESSIVE VIBRATION.
ADDITIONALLY FOR 4WD VEHICLES, THE PROPELLER SHAFT’S CENTER SUPPORT BEARING BUSHING MATERIAL MAY NOT EFFECTIVELY DAMPEN VIBRATIONS IN COLD (BELOW 32ºF) TEMPERATURES."
