The Traxxas E-Revo VXL 2.0 Pro-Built Complete Transmission is a pre-built replacement for the E-Revo VXL 2.0 RTR 4WD Electric 6S Monster Truck. Traxxas Pro-Built parts allow you to get your rig back in action faster and with less effort. These components allow you to replace parts as a complete unit, no assembly required.