This truck uses 3 point-suspension on every live axle. The axles are connected via levers in a manner that allows extreme movements. Every axle is propelled via worm gear and a 24 tooth gear, no differentials (no room). Here are vidoes of truck in action: http://www.youtube.com/watch?v=c6CNKKPfS88 http://www.youtube.com/watch?v=2biZNM1xcRA http://www.youtube.com/watch?v=Dv6FC0uIjEY http://www.youtube.com/watch?v=O2yswznXqTc http://www.youtube.com/watch?v=UJSOwY1nubI http://www.youtube.com/watch?v=YUlH-SYR1d0 http://www.youtube.com/watch?v=FLZrEAtlzfU Any comment or question please send on my messenger slovenecyes@hotmail.com