Pull the hubs and clean them out good with gas or solvent, especially down deep inside. going together pour some red transmission fluid in it, pour the first one out into the second one, then pour that out into your recycle oil. Using your fingers check they're all turning well. Inside your right front drive shaft you have a u-joint, make sure it's greased and working freely.
Check inside your front differential for the oil level, that may well be a very un maintained area
Properly maintained and operated that drive will go a long ways and last a long time, and all you ever have to do is reach up there and push the button