I have two tool boxes mounted at the rear of the bed just inside the tailgate, approx. 100-150lbs. The suspension on the Tundra is very soft, this allows the rear end to bounce and even bottom out when going over even moderate bumps, dips and rail crossings.  I've only driven the truck a few times but the improvement is impressive. The Active Suspension seems to have greatly reduced or eliminated this problem.  I'm very happy with my purchase so far.  - Mike E.

Additional Specs: Standard Duty Kit