SOLVED Physic issues after conversion from RF1

Hi All,

I converted a car from RF1 and after conversion, there are some physic issues.
https://steamcommunity.com/sharedfiles/filedetails/?id=2952255790

1. Flipped over at specific curbs


When pass through specific curbs, car flipped over.
(The curb of the video is the curb after the first corner of the Brand Hatch)

2. Can't move on the grass
When the car goes out to the grass, it can't move afterwards.

Is there anyway to fix these issues?

Thanks,

 

Check the undertrays values in HDV,they must be to low,or the collison mesh.

 

Or the undertray friction, which is much lower in rF2.

 

Thanks guys, I'll look at the settings!