Vehicle Physics Asset Weired Collision Volume

I Imported some car model by skeletal.

and I setup a collision volume on physics asset view.

all collision volume is seems be correct in physics asset view.

but, i placed editor view this model, and collision volume is weired(big huge)

I imported on 3dmax, and reset xform and collapse modifiers.

car model has front x, right y, up z directions.

anyone solved this problem?

I search for this hub and forum and google it but, I can’t solved problem.

please help.

best regards.