It's been a while, but I believe my Fabtech lift came with Dual shocks, steering stabilizer, pitman & idler arms and heavy duty tie rods. I had some nasty loose steering issues right away. Removed the pitman and idler arms and that solved the problem. I would never say that the handling is poor compared to a stock H2. In fact, I like it better. And I agree with Stacy, I will never drive one without the lift!
Now as to your diff leak, I am blonde and can't help you with that
though I could whip you up a mean hot chocolate! (It's cold here today!)