O.K., so found out that the noise I've been hearing is a dry spline. Honda recommends moly lube every 8,000 miles. Ironic that I have to chg, tire every 10,000. So, long story short, it's lubed, spline had no damge, no noise now, we're good to go mates!
The pinion cup and drive shaft mating spines are often missed during final drive service. If you didn't check, clean, and re-lube the pinion, I recommend it. Moly grease (not paste) is called for, but any high-grade waterproof grease will do.