A Navistar employee sorts items inside its new Midwest Parts distribution center during an opening ceremony in Joliet, IL on Monday June 11, 2012. | Matt Marton~Sun-Times Media
Navistar employee Richard Parkman, center, sorts items inside its new Midwest Parts distribution center during an opening ceremony in Joliet, IL on Monday June 11, 2012. | Matt Marton~Sun-Times Media
Navistar employee Mike Urso, center, sorts items inside its new Midwest Parts distribution center during an opening ceremony in Joliet, IL on Monday June 11, 2012. | Matt Marton~Sun-Times Media
Navistar's new Midwest Parts distribution center during an opening ceremony in Joliet, IL on Monday June 11, 2012. | Matt Marton~Sun-Times Media
Navistar employee Mike Kurek, right, sorts items inside its new Midwest Parts distribution center during an opening ceremony in Joliet, IL on Monday June 11, 2012. | Matt Marton~Sun-Times Media
Navistar Chairman, President and CEO Daniel Ustian. | Brian Jackson~Chicago Sun-Times
Navistar Chairman, President and CEO Daniel Ustian speaks before Gov. Quinn signs worker's compensation reform legislation and discusses steps taken to improve the state's business climate and create jobs at Navistar, 10400 W. North Ave., Melrose Park., June 28, 2011 | Brian Jackson~Chicago Sun-Times
Navistar International Corp. is under scrutiny by the U.S. Securities and Exchange Commission, the Lisle-based company disclosed Thursday. The company also announced it will use Cummins Inc. engines in certain trucks to meet federal emissions standards. Shares fell 13.4 percent, or $3.33, to close at …