The CV shaft splines get lubed with a moly grease. I had a moly assembly lube from way back when, so I used that, but you can pick up a moly grease from autozone.. I will say though: The assembly lube -- I must've applied it before. When I went to remove the cv shafts for this job, they slid out of the wheel hubs with the push of a few fingers. They were completely unbound.