I tore down the knuckles last night. Whew, glad to have that part behind me. Found some interesting grease in my passenger side - a nice mix of army green and dayglo green greases.
Getting the knuckle caps off was fun. In the end, just pried them off with a pry bar (or better yet, two at the same time). Also, you can take the top one off, then use a brass drift to knock the lower one off.
Make sure you keep up with the orientation and location of the shims - they need to go back with the same orientation and thickness when reassy begins. If you are replacing your shims, at least you will have the thickness so that you don't have to mess with the lash of the gears in the diff (assuming the lash is good when you started!).
Its a messy process, but it's not that bad if you
1. use gloves
2. use a scraper (spatula, spoon, etc)
3. use a shopping bag to slog off all the grease
4. use lots of paper towels to get the grease globs off. I pull them out of the trash daily when my wife and kids dab the water off their hands and toss them. I have about 10 rolls worth in a big tub. Amazing how a little grease off the counter, or when someone used it as a napkin at dinner doesn't bother me when I'm "saving" a used paper towel now. After they are completely soaked with 1/4" of grease from the knuckles, only then do I know that paper towel is used up. (My wife absolutely hates that I do that).
Here's my "spatula". Plastic spoon. Gets in the creases very well, scrapes a lot off the knuckle.
