Procedure F - Driveshaft/Differential Phase Matching

Before beginning diagnosis of driveline vibration, inspect the general condition of driveline components. Look for any signs of damaged or loose parts, or for foreign material such as undercoating on the driveshaft tube. Correct any discrepancy immediately and retest to verify vibration. Vehicle must be lifted by axle during diagnosis to maintain proper relationships between moving components.

Remove driveshaft and reinstall to differential flange after rotating 90 degrees clockwise from original position. Test for improvement. Repeat this procedure to find the position at which the vibration is smallest.