Unity 5 Mecanim Legacy Animation, Adds root motion using animator Forward

RootMotion.cs

using UnityEngine;
using System.Collections;

[RequireComponent(typeof(Animator))]

public class RootMotion : MonoBehaviour {

	public float runSpeed = 10;
	
	void OnAnimatorMove()
	{
		Animator animator = GetComponent<Animator>(); 
		
		if (animator)
		{
			Vector3 newPosition = transform.position;
			newPosition += transform.forward * animator.GetFloat("Forward") * runSpeed * Time.deltaTime; 
			transform.position = newPosition;
		}
	}
}