Vibration at Highway Speeds

CAUTION: Never grasp half shaft assembly by the boots. This may cause the boot to pucker or crease and reduce the service life of the boot.
Avoid over flexing or stroking the C/V joints when handling the half shaft.
Half shafts exposed to battery acid, transmission fluid, brake fluid, differential fluid or gasoline may cause the boots to deteriorate.

DIAGNOSIS AND TESTING - HALF SHAFT
Check for grease at the inboard and outboard C/V joint. This is a sign of boot or boot clamp damage.

VIBRATION AT HIGHWAY SPEEDS
This problem could be a result of out of balance front tires or tire/wheel runout.

Foreign material (mud, etc.) packed on the backside of the wheel(s) will also cause a vibration.