I applied online. The process took 4 weeks. I interviewed at International (Warrenville, IL) in Aug 2008
Interview
Navistar uses Lominger Core Competencies when interviewing. Research these competencies and be prepared to indicate a specific situation or task that demonstrates that competency, how you handled the situation, and the result of your actions to remedy the situation/problem you're describing.
Interviews are conducted by multiple managers (as few as 3 and as many as 4 in my experience) and questions are asked round robin by the interviewers.
Interview questions [1]
Question 1
There isn't really a specific question that is difficult or unexpected (especially if you research the Lominger Core Competencies before the interview process) but if the core competency you're being asked about does not really pertain to your career history coming up with a specific example for that core competency can be difficult.