Originally Posted by 05Rrunner

If left stock the KDSS system works as intended , it gives you a big swaybar on the street but allows it to be looser Offroad. It's a good compromise mall crawl solution.

The problems when modifying.

Why is it not on the PRO ? In Toyotas testing it was discovered that the increased travel (shock stroke) and increased wheel speed caused KDSS cylinders to get hot and the oil would foam and lose their effectiveness at high-speed's. This is the opposite of what you would want in a high-speed desert situation. The system just did not have the oil capacity for cooling.

Lift kits : when you lift your truck no matter what shock or suspension you install the KDSS cylinder is the limiting factor. In Toyotas design the shock limits downward travel and has an internal bump stop built in. When you add long shocks you change that engineering and make the KDSS cylinder the limiting factor which does not have an internal stop, It is not designed to limit down travel. This is pretty simple to demonstrate on a lift. So you could do a long travel suspension but it's like having stock shocks. It's counterintuitive it just does not work.

Negatives : Cost , weight , it reduces your ground clearance, It's heavy and vulnerable off road , it's very difficult to service. Very few dealers and or off-road shops even know how to work on it. I question it's long-term reliability and I mean 10 years from now. At some point parts will be hard to get. It's an interesting engineering exercise. I would call it a gimmick.