This is the Hot Racing Complete Steel Gear Transmission for the Axial AX10 and SCX10 platforms. This complete transmission features a heavy duty 32 pitch, 57 tooth spur gear. Features: Hardened steel spur gear and internal gears Full sealed ball bearings Locked output gear Billet machined aluminum transmission case and motor mount Transmission case is anodized black with secondary-processed machined beveled edges Motor mount plate and gear hub are anodized green Super duty adjustable metallic-pad slipper system Heavy duty 32 pitch 57 tooth steel main spur gear Assembled and ready to install Compatible with Axial AXI80078 stock gear cover and Hot Racing HRASCP32X01 aluminum cover (see requirements below) Uses stock bearing sizes for easy replacement, if needed Specifications: Weight: 5.1oz (146g) Requires: Must use with 0.8 Module (32 pitch) pinion Gear Simple hand tools Installation Recommended to inspect all hardware prior to use and use a removable locking adhesive on screws threading into metal For Axial AXI80078 gear cover or Hot Racing HRASCP32X01 aluminum gear cover, Axial backplate AXI80078 is required. Backplate center hole may need to be slightly enlarged.