I heard they Humvees were being replaced with some new vehicle. Not sure on the details, though.
I'm not even sure why AMG, or who ever makes the Humvees now, uses the parts they do. The half-shafts were intended to be the weak link, and I can understand why that is. But, they use a chain driven t-case that has proven over and over again to be junk. The 6.7L chevy does not get the proper cooling it needs, thus blows the #8 cylinder gasket every 15,000 miles. Over the last 20 years the things have been made, one would think they would get a clue. They finally got it almost right with the A1 Alpha, then they stopped production. I guess the military pulled the plug to warrant further testing on the civvies.