Hey lesterl, when I was hunting around for a rear axle assembly for my `99, the selection criteria differentiated between axles with swaybar and axles without swaybar. There's even different salvage yard codes for what would be considered identical axles.
I don't use swaybar, so the selection/availability list was larger in my case.
However, I'm totally clueless as to the actual mechanical differences between the two. I haven't even seen a swaybar setup, so don't know where any swaybar perches would be positioned...