Yes these knuckles were meant to have the same lube (90W according to the book) as the differentials. The wipers don't seem to hold the lube very well so I run straight 140W, it still slobbers but I live with it.
I pack the wheel bearings but don't add any grease in between, because I was taught that if you pack that area with grease when the grease in the bearing heats up the cool grease in between will draw the hot grease from the bearing. Don't know if thats a fact but thats the way I've always done it.