Ok, I have made a few breakable trucks. I didn't make the trucks themselves, but just made the fiber glass bodies breakable. So far how it works is, when part of the body makes contact with something, it simply falls off. I have made Gas monkey, grave digger, and zombie. Only a few problems. Zombies arms do not fall off, but the rest of the body does. The second problem is that the wheels do not break. If anyone could help me make the wheels breakable, I will release the pack as beta. That's all for now.