The iconic American brand Mack Trucks is celebrating its 125th anniversary this year. In 1900, brothers Jack and Gus Mack made their first motorized vehicle, a bus, in Brooklyn, New York.

In an effort to give Mack Trucks’ vocational customers improved durability and broader options for their applications, Mack is now offering a 23,000-pound rear axle and Cummins B6.7 engine with ...