Visitors to the Mack Trucks booth this week at the NTEA’s Work Truck Show are being treated to two separate Mack models designed to offer durable, productive work trucks for customers. A Mack Granite axle forward dump truck with a Mack MP8 engine producing 425 hp. and up to 1,540 lbs.-ft. of torque is on-site. The engine is mated to an mDrive HD 12-speed transmission. The truck features 46,000 lb. rear axles and a Mack Camelback spring suspension. The mDrive, which offers a lightweight transmission option with the same reliability and durability, Mack said, is now standard on Granite models. Also on hand is a Mack Granite MHD with an axle back 4x2 snowplow option. Equipped with a Cummins ISL9, 345 hp. powerplant mated to an Allison 3000 transmission, the truck is designed for rugged work. It features a 16,500 lb. front axle and 23,000 lb. single rear axle.