1. Check the drive shaft joints for looseness. If excessive play is found, tighten or replace the drive shaft with a new one.
2. Check the anthers for damage and cracks. If any defects are found, replace the drive shaft with a new one.
3. Manually move the spline and driveshaft pivots up and down and left and right to make sure there is no excessive play. If any defects are found, replace the drive shaft with a new one.