Physic assets bodies jump to root when simulating

I have a simple car physic asset that is messed up. For some reason when i try to simulate, The 4 wheels jump to and stick to the root location. The root bone is at the bottom in the center of the model.

The problem was within the model somewhere. I completely reset all user settings in 3ds max and recreated the model for the 4th time and it worked. Ton of time wasted :frowning: