LISLE, IL—Members of the UAW have ratified a four-year contract with truck maker Navistar International Corp. that will provide workers with a combination of wage increases and bonuses, while maintaining a two-tier wage scale for new hires and veteran employees.

LISLE, IL—Navistar International is increasing production rates at its heavy truck assembly plant in Escobedo, Mexico, and its bus assembly plant in Tulsa, OK.