I’m pretty sure Oshkosh won the contract. The JLTV may not be fielded yet, but there are a bunch of them, of two different varieties, on that train. I recognize the big “cage” structure on the back end, and the shape of the windows on the side doors. The rear passenger doors of the Oshkosh truck have a really distinctive very tiny window. There are two different “noses” on the vehicles on that train, so they may be testing a couple of different versions of the Oshkosh truck.
Oshkosh’s own webpage shows at least three different noses for the JLTV, a high-nose, a medium-nose with really high fender arches, and a low-nose with the headlights almost at axle level, as well as an air-droppable version that looks completely different from everything.
I only know this because I really like the look of the “high-nose” version of Oshkosh’s truck, and would love one day to get my hands on one, even if it didn’t have the armored body. It reminds me of the old ‘70s GM truck line.
Lockheed Martin, AM General and Oshkosh are competeing in the EMD phase for the contract to build 60,000 JLTVs. The only JLTVs out there are TD and EMD phase prototypes. What you are calling JLTVs on that train are Oshkosh MLTVs.