When I Add Parts To Cars Parts Just Doesn't Stick. Some Times Every Part In The Car Doesn't Stick. So How I Fix This Problem
To clarify, you are creating a mod that adds a new component to a vehicle. When you select the new part in the parts selector, it spawns but falls to the ground. Is that correct?
sorry for the late answer but No the part is attached to car but doesnt stay in one place when turning or part spawn to the ground and does the same thing --- Post updated --- and sometimes this happens
Make sure to apply the location, rotation and scale of the objects before exporting them. If you are using blender: select the objects, and press CTRL + A