fred.... with all the stuff you have removed so far, and with so little to remove to do it all, i would definatly remove the final drive, and the drive shaft. pull the drive shaft out of the final drive...clean and lube the pinion cup/both ends of the drive shaft, and put it all back together. you will feel alot better knowing it's done right by you.
+1
There's always been lots of empahsis on the drive splines in the pumpkin, but it is equally imprortant to check and clean and lube the pinion cup and driveshaft splines at the same time. This part is often neglected by dealers and DIYers alike.