Preliminary Inspection
BootCheck the boots on the driveshaft for cracks, damage, grease leakage or loose boot bands. If any damage is found, replace the boot.
Spline looseness
Turn the driveshaft by hand and check that the spline and joint are not excessively loose.
If damage is found or joint is loose, replace or repair.
Twisted or cracked
Check that the driveshaft is not twisted or cracked. Replace if necessary.