Changes made was a 500hp engine was swapped in for more power on the rocks and the farthest rear axel had its suspension disabled to prevent bouncing when climbing. 2nd Version of my original offroad military truck. To start the engine, press 1, which also activates the head and tail lights. Press 2 to turn on the dumper. The dumper is controlled with the pitch axis. The dumper will tilt to about 25*, open the tailgate, and pushes out the material with the dump pusher. Here is my recommed way of dumping: Stop the truck, and press 1 to turn off the engine. After that, press 2 and then dump by pitching you stick (or whatever you have assigned tha at controls the pitch axis). Have fun hauling parts, blocks and dumping!