Well, I installed my Gibson split rear exhaust, leaf spring helpers, and chnaged the rear diff to Mobile-1 75W-140 and a K&N airfilter.
The exhaust is perfect for me! Not overly loud, but not quite. The best of all, good rumble at low speeds, no noise at high speeds.
JetTech was right about the leaf spring helpers! I never had any problems, but spent the $22 to be safe. I notice better stability and control and a little stiffer ride. Thanks!
Again, everyone was right about the diff fluid. As I was draining the fluid and it smelled like crap (literally)! Does that mean it was burning the gear oil? Also, it only took 56oz to fill. However, since the change, I hear a very faint chime noise from the rear in between speed of 30-45mph. Any ideas what it is?

Overall, very satisfied with my firt mods...unless you count a bug shield, vent visors and tinted windows as a mod!

I think you might be a little low on the gear oil. You might want to check the level again.

I thought it was a little low as well. However, I squeezed the oil in until it oozed out. How do I get more oil in than the fill hole?