"What we can say is that our alliance with Volkswagen Truck & Bus, which recently celebrated its first anniversary, is already demonstrating strong progress. We look forward to continued success with our strategic alliance." More: How Trump's protectionism could backfire on Midwest manufacturing Navistar to end engine production in Melrose Park The Volkswagen truck division's preparations for an IPO or a debt sale will take 12 months, and MAN's Diesel & Turbo engine and Renk industrial-equipment units will be shifted from the business to parent Volkswagen, the executives said.