WTH
CUSTOM 6X6 HYDRODRIVE SYSTEM – This unique system uses a hydrostatic drive system to provide power to the rear trailer axle in extreme off road conditions (sand, mud, snow, etc.) enabling 6×6 operation at speeds up to 25mph, at which speed the system automatically disengages and the trailer axle freewheels. The trailer axle is suspended and controlled by the same hydropneumatic system as the tractor and shares the same CTIS functionality.