Changing skeletal mesh changes the follow spline behavior. Why?

Thanks. Meaning just copy the same bone names? Or also wheel class names?

For the record, what I need or am trying to do is to have the car look different, but use the same follow spline set up. So I don’t have to build the follow spline set up from scratch for every car I want to have driving around the town. But they should all look different, as in different model of cars. But of course, driving on different splines. So I can populate the town with driving cars etc. And even have a few hero cars. But all using the same follow spline set up. Not sure this is the easiest way. but I set one car up and just migrate it to different projects, duplicate etc.