I'm using the lastest versions of both (i.e. I already moved the root-bone to 0,0,0 I tried different rotaions of the root bone and settings when exporting regarding the up-axis, to make sure it doesn't have anything to do with the coordinate system - which it doesn't. Is there anything, that might cause this? Do you think this is a problem in 3ds max or in unreal (let's not cal it 'problem', because it's propably not a software bug, but instead mis-use from my side^^) ? I couldn't find anything on the web and I have no clue what else to do. It seems like the animation is playing like a double additive, if that makes any sense, because some rotations look like they are twice as strong. Also, when I fix the bones more or less within Unreal to somewhat match the real animation, but even then the animation doesn't play correctly. None of that stuff is part of the animations, nor did it happen in Max. I can't import them directly into unreal, because they don't have a root bone to them. The same thing happens when I import an fbx File into 3ds max. Both arm are rotated by some random amount, the clavicle_l is also rotated by 180° (check out the attachments)

Both thigh-bones are rotated by 180°, though in different directions. That enabled me to import it into UE4, but the animation was really f**ked up.

To fix that I renamed all the bones in the Biped skeleton to match the mannequin.

This first atempt didn't work, because the root-bone is called differently than the one in the UE4-Mannequin. So I created a standard Biped in 3DS Max and stripped the anim to that skeleton. bip-Format and I wanted to transform them into fbx (obviously, since I want to use them in Unreal). Recently I downloaded some Animations in. I'm really new to Unreal Engine and 3DS Max.

Ue4 mannequin skeleton download