Doosan DA30 ADT is redesigned with a 365-horsepower Tier 4-Interim engine with 8 percent more power than the predecessor MT31. Torque has been pushed to 1,381 ft.-lb. at 1,300 rpm, a 28-percent jump. Top speed is now 34.2 mph for the truck. The transmission has eight forward and four reverse speeds, and improves the transfer of power to the wheels for better traction, Doosan says. It has permanent six-wheel drive.