I've read thread after thread about the "saggy" rear ends on the cherokees. I finally went out and purchased the Heavy Duty springs from Quadratec and my first reaction after all said and done was "holy crap" I couldn't believe the lift it gave the rear end. Before the rear was 1.5 inches lower than the front and now it is 2 inches higher than the front, changed a whole 3.5 inches. I didn't expect that, but am pleased with the outcome. I'm sure after awhile it will settle a bit, but it looks alot better. Hopefully this answers any questions anyone had about these springs.