Rear Suspension Coil Springs problems of the 2000 Mitsubishi Montero

The vehicle was sold with inadequate rear coil suspension resulting in the vehicle "bottoming out" with rear passengers. The vehicle was represented to be able to tow 5000#. But due to the improper suspension, towing anything is dangerous as a result of the inability of the suspension to accommodate minimal tongue weight. Supposed repair did not fix the problem. A cushion was installed rather than increasing the coil strength or otherwise "repairing" the problem. The cushion merely attempts to "mask" the inadequate suspension and does not resolve anything.