After 40+ years, the original leaf springs were sagging to the point that I frequently "bottomed out" when going over bumps. CJ's new leaf spring kit fixed the soft suspension- but raised the rear 2" in the process. The lowering kit was a quick and easy solution- resulting in the perfect stance. The kit has everything needed and takes at most 40 minutes to install. I wish ALL projects were this easy! I've had no axle hop issues (but then again, my inline six doesn't exactly create monstrous levels of power :^).