Post by
Desert Rat »
https://forums.nicoclub.com/desert-rat-u54558.html
Thu Oct 17, 2019 2:23 pm
it should be getting lubed by the fluid in the transmission and generally doesn't need servicing unless the seal is leaking.
There's always a little slack - most of it is lash in the ring and pinion gears in the rear end. The slip yoke goes onto a splined shaft and should have very little wiggle, but you can check it by unbolting the driveline from the rear axle and twisting by hand.