No you dont. traxxas makes a reverse module that fits the revo 3.3 or the new tmax 3.3.

Its $42, and comes with everything you need. its traxxas part # #4995X http://www3.towerhobbies.com/cgi-bin...95X+&search=Go

I would'nt buy a nitro without reverse. its not that often you need it, but if it saves me from having to walk across the field/track/parking lot once, its worth it! Is not lazy or opposed to exercise, its just that when I'm playing, I want to play, not walk toward an idling truck, when I can avoid it.