Last year, Traxxas changed the design of the Velineon VXL-3s ESC and 3500 motor. It’s important to choose the right combination because the old versions and new versions are not cross-compatible. Not sure which one you need? Check out the info below!
ESC: Part #3355X
Bottom is completely flat, and the fans run horizontally when looking at it from the front.
Motor: Part #3351
Wires are smooth (no texture) and has white Traxxas lettering
ESC: Part #3355R
Bottom has a curved section carved out of the rear and the fans run vertically when looking at it from the front. It will have 3355R written on the front.
Motor: Part #3351R
3351R will be written on the motor cover, and wires will have “braided” texture.