That's the cam rear seal I had to use, too, even though I was told it should use the tap-in one. Curious, isn't it?

The transfer case uses regular 90W GL lube, or the close equivalent, i.e., 75W-90, bla, bla...(Please correct if I'm way off, but I think that's right. They're not too sensitive, as I recall).

You can do a body lift for about $100 or add-a-leafs for even less. I have both. Others substitute longer rear shackles for the leaf springs instead of add-a-leafs. Either way, if you lift the rear, crank the torsion bars for front lift and trim the rubber bump stops on the front suspension for a little more travel. You'll see which ones as you start cranking on it (use an air rachet, if you have one, the bolts take a lot of turning to raise the front). Don't crank the front up so far that they rest on the bump stops or the ride is really horrible.

I like the body lift, myself. Pretty straightforward.

John B.