Model D300 articulated truck replaces the D30 in the 30-ton dump truck class. The unit hauls its 20.9 cubic yards heaped volume payload with a 300-gross-hp Cummins turbo diesel engine. It features a ZF 6WG260 automatic six-speed transmission with operator selectable Powershift. It also has ZF self-proportioning limited slip differentials on all axles. The front hood can be tilted forward electronically for easy serviceability.