The suspension on the armored tracked vehicles are a bit stiff right now, when you go along the terrain they conform to fit the profile however when they gain any air and come back down the suspension does not appear to absorb the impact, it just stiffens up.

Here are video examples.
http://www.youtube.com/watch?v=Lj75U7TkBBY
http://www.youtube.com/watch?v=UdwtMa5gbKU
http://www.youtube.com/watch?v=bnYolaNnyHo

Throughout this video you can see a few subtle effects of the suspension at work. http://www.youtube.com/watch?v=rawWnDRtQv8

Notice how when the tank lands or hits a bump while moving forward, it bounces a bit.

And this is how it is in Arma 3, looks a bit stiff.
http://www.youtube.com/watch?v=z-ay-1kEIzk&feature=youtu.be

And another Arma 3 video, would love to have bounced a bit on those landings :D http://www.youtube.com/watch?v=KOcUE6buWjU&feature=youtu.be