Oshkosh, which has a long track record of building military trucks and armoured vehicles.
Oshkosh beat competitors Lockheed Martin and AM General, which makes the Humvee. The rivals may yet file protests over the contract award, which could potentially trigger delays.
In total, the Army plans to buy nearly 50,000 of the vehicles before 2040, while the Marine Corps wants 5,500. The total value of the contract over that time is estimated at $30 billion, with Oshkosh beginning to deliver vehicles 10 months from now.
John Bryant, the senior vice president of defence programmes at Oshkosh, said vehicle designers focused on the threat of roadside bombs.
Unlike in a Humvee, parts of the new JLTV fragment so explosive forces are carried away from the cab, helping to dissipate the deadly energy.
“Pieces of the vehicle will definitely fly off,” Bryant told AFP.
“They are supposed to behave that way. You can see significant levels of destruction to portions of the vehicle, and yet the crew capsule with that precious cargo inside remains intact — and the crew survives.”
While precise technical specifications remain secret, Bryant said the new vehicle has been designed for the future, meaning it can be readily adapted for changing military needs.
For instance, it can come fitted with a turret for a regular gunner, or else it can be equipped with a remotely operated weapon.
Similarly, it would be relatively straightforward to make the vehicle remote-controlled or give it a hybrid-electric engine.
Imagine a convoy of military vehicles: if the leading one is remote-controlled and hits a roadside bomb, there is no crew to get injured. The Oshkosh JLTV has a hulking front end covering a 6.6-litre diesel engine and small, bulletproof windows.
The vehicle is comparatively speedy, going up to 70 percent faster than any other military vehicle over rough terrain. And it’s light enough to be carried by a CH-47 Chinook helicopter.
Just as the Humvee was adopted by foreign armies around the world, Bryant said several countries have already expressed an interest in the JLTV.
“The requirement for protected mobility combined with extreme off-road capabilities seems to be a relatively universal requirement,” he said.
In the wake of the first Gulf War from 1990 to 1991, the Humvee gained worldwide fame as news crews filmed it roaring across desert sands.
The vehicle, which is technically called the HMMWV, became so popular in the United States that AM General made a civilian version called the Hummer.
One of the original purchasers was another well-muscled American icon, Arnold Schwarzenegger.
Though the Army will continue to maintain a fleet of Humvees, their numbers will gradually dwindle. But the vehicle remains popular with foreign armies — last year the US government approved the sale of more than 3,300 of them to the Mexican military.