if I add Time.deltaTime. the movement of the vehicle will become shaky, because The values are different from frame to frame,how can I fix it.
Could you help me if you have solved this problem,please? I have the same problem.
That is the purpose of this Time.deltatime… Since each frame takes different times, teh Time.deltatime compensates.
You are calling it in the Update. Right?
Be sure to change position in the LateUpdate function. If you put too many things around a project to Update, you will never know in what order will be executed. The LateUpdate is executed after the Update.