Truck manufacturers seek to partner with Army depots.

Billions in procurement funding over the past decade allowed the Army to build up a fleet of tactical trucks that was more than adequate to meet its needs. Those trucks, which number about 278,000, are now an average age of just two to three years--the youngest fleet in modern Army history, said Col. Doyle Lassiter, commander of Red River Army Depot.

As procurement budgets continue to recede, the Army must transition from buying new vehicles to sustaining the ones it will keep after the war in Afghanistan, said Don Tison, assistant deputy chief of staff for Army G-8.

The Army has more than the 240,000 vehicles its...