Agree with @morrjr71.....I own both Traxxas and Arrma vehicles, and I don't recommend using a Traxxas ESC in an Arrma. Many of the Traxxas ESCs have high failure rates: if you go to any of the Traxxas forums (other than the official Traxxas forum) you will see what I mean. Many Traxxas owners who upgrade buy Hobbywing ESCs and motors.
I second this, and add this as well. I would go with HobbyWing, Reedy, or Dynamite for ESC's before i would any of the Traxxas ESC's. The only thing i like about Traxxas brushless is that the motors can be rebuilt cheap.