Simulating a car is a classic "trivial to start, impossible to master" problem. A real car is a symphony of conflicting forces: engine torque, tire friction, suspension dampening, weight transfer, and aerodynamics. Getting a car to feel right—whether it's a drift-happy arcade racer or a punishing simulation—requires serious physics programming.
Debug.DrawRay(transform.position, -transform.up * suspensionLength, Color.green); car physics unity github
void Update()