After cleaning and washing the shafts, check the cardan joints for ease and smoothness of turning the forks and for the absence of significant axial and radial clearances.
Check the balance of the driveline on the balancer as indicated subsection 5.3.7.
If the turning of the forks is smooth, there are no jamming and tangible gaps in the bearings of the cross, the unbalance of the driveline does not exceed 2.15 N·mm (220 gf mm), and the circumferential clearance in the spline connection is not more than 0.30 mm (according to the average diameter of the slot), disassembly of the driveline is not recommended.