
Mack Trucks adds 23,000-lb. rear axle, 325 hp engine rating for MD Series
Mack Trucks now offers a 23,000-lb. rear axle and Cummins B6.7 engine with up to 325 horsepower on its Mack MD Series models. Designed for a Gross Axle Weight Rating (GAWR) of up to 23,000 lbs., the heavier axle and suspension offer increased capability …