I was driving quite extensively around the coasts by the Spartan shield, over rocks into, through and out of hood level water. Flipping, rolling and plunging the trucks over the landscape with reckless abandonment. There was no visible indication of damage to the truck model or the status meter dialog. Could just be that those meters are not working well enough. But then, the trucks did drive better over flat terrain once I was able to get past the incline.