This is the Complete Planetary Gear Differential With Steel Ring Gear for the Traxxas Bandit, Stampede and Rustler. FEATURES: Metal gear shafts Metal and plastic main differential INCLUDES: Main differential with steel ring gear Planetary gears and shafts Sun gears and shafts Silicone grease REQUIRES: Installation on the vehicle COMMENTS: For main differential w/ steel ring - TRAC6380 Planet gear shafts - TRAC6382 Silicon grease _- TRAC6037