Originally Posted by
RPK79
Yeah, no need to grease anything. Personally, I would buy a new cassette and put that on there so you have the old wheels ready to go for backup.
You do need to grease the threads on the lockring. The torque spec is 40nm. Put that on with no grease, and try to remove it 2 years later, you'll wish you greased the threads.
No need to grease the freehub body, but a little grease on the rails is not going to hurt anything.