These are the Gearbox Halves for the T-Maxx 3.3. FEATURES: Holds all gears including the 2speed gear set and input shaft Gray in color, constructed of hardened plastic Fits front or rear of vehicle INCLUDES: One each Front and Rear Gearbox Halves, Rubber Access Plug, seven 3x13mm socket head screws REQUIRES: Fastening to chassis COMMENTS: For the 3.3 version only.