I purchased my car with the Pro-Kit suspension already installed. The issue I am having is that the rear springs are VERY soft. I can push the rear end down about 4" to 5" with one hand and very little effort. I am bottoming out the fenders on my new tires and I think this is the issue.
Check the rear shocks, they sound like they are shot. It shouldn't be that easy to push down unless the shocks are completely shot.
I was kind of thinking the same thing. But I didn't think that the shocks would have the great of an impact.
You would be suprised, I can almost make my front end bounce on my Explorer cause the shocks are shot lol
Are you sure the rear springs are from the PK? The part number should be easy to see on the spring itself. As noted, that's not normal.