No guarantee but likely the SC rear shocks are using the patented Nivomat technology. I was interested in it, read it, and this weekend had a chance to test it. The below pictures show the empty standard ride height 38”, then I loaded 960 lbs of softener salt it dropped to 35.5”. If felt “wiggly” in the rear as I pulled out, within a mile about it seemed to stabilize and the vehicle tightened up noticeably. After an 18 mile interstate run at 70mph I unloaded and the rear suspension was up to 36.5”. Pointless to state the specifics of what my QX56 can handle but its rear air leveling suspension can just level back out if I keep the tongue weight below 500ish lbs so I’m impressed with this system providing an inch lift with 1000 lbs in the bed. I doubt it’s design is supposed to lift to original ride height anyway. The bed lifted to 38 3/8” as soon as I unloaded, forgot the final pic but you’ll have to trust that after 3 miles to the next store it had settled back to right at 38”. Tire temperature for those interested stabilized quickly on the interstate at 39psi indicating around a 25ish degree increase in tire temprature.
Maz
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1,299 Posts
Yeah, from what I understood, inside the shock is basically an internal air spring, and when it detects its sagging (not quite sure on how) it will use the up and down motion of the suspension to pump up that air spring to increase the spring rate. Then when it detects the load is gone, it will deflate to reduce the spring rate and soften the unloaded ride. There are surely limits though to how much extra spring rate the air-spring can add, so naturally with enough weight the suspension will still compress but to a lesser degree than if it had no extra air-spring, and without the overly stiff truck like ride of just always driving around with an overly heavy rear spring when unloaded.
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