Sway bar issue

[Nightrage]

My dad and I installed my sway bars today, but something's not right with the rear bar. It sits right up against my differential and it's either sliding up the differential, or just rubbing when I hit bumps, as it left a 2" mark down the differential cover. The car looks like it sits higher in the rear too. I told my dad that something isn't right, but he thinks I'm imagining things. As I was driving it, the car started vibrating past 40 mph. It looked like the sway bar was under the diff., then was pushed out and up along the edge of the diff. cover. What did we do wrong? What would the effects be to continue driving it, and what would happen if I drove the car with no rear sway bar? I feel like a schmuck :-(

[Nightrage]

Ok, so we may have installed it upside down...theoretically

[Injuneer]

The only time I've seen the sway bar hit the bottom/back of the differential cover is with an aftermarket 12-bolt, with a large cast cover on it, like I have. In that case, I had to simply notch the brackets that held the sway bar against the axle tube, so the bracket could rotate slightly to the rear, moving the sway bar away from the cover. Eventually, Strange started adding extended, welded brackets to the 12-bolts as standard. Spohn also sells sway bar brackets that move his huge 1-5/16" solid chrome moly drag sway bar away from the housing.

[ConElite]

glad you guys figured it out.