Spoiler Warning:

Near the end of the movie, when Nux flips the War Rig to seal the gap, the underside has the distinctive Tatra backbone drivetrain, which I thought was weird, so I looked it up:

Sure enough, that’s accurate. They modified an honest to God Tatra for the movie. I didn’t think I could love that movie anymore than I already did, but a legit Tatra 6 x 6 as their big rig is all the right kinds of awesome.