Mack is one of the most popular semi-truck brands in America. With models like the Mack Anthem and Mack Granite, the company has helped define trucking life in the States since the early 1900s.

Mack’s market share decreased to 5.8% from 7.1% but this was largely offset by its sister division, Volvo Trucks’ increase in North American market share to 10.5% from 9.7% the previous year.

Some Mack Trucks workers at the company's plant in Lower Macungie Township are speaking out about what they call "broken" ...