The OEM VX spring helpers contact the rear axel at all times when the vehicle is in forward motion. You can check this by looking at the '97 JDM phanton view in the sales brochure. You'll notice the spring helper at rest is only about a quarter of an inch off the axel plate. It was the intended design, to help insulate the axel from the frame, as well as to help the springs absorb energy and counteract the natural roll-over tendency of such a tall vehicle. That's all the magic there is to it.