2021 laydown transmission for the Prodigy, and Arrow Complete Transmission Kit Includes choice of machined case 57-1237 carbon fiber motor plate 57-1172 idler shaft 57-1173 top shaft 57-1183 slipper eliminator 57-1184 gear diff assembly or 57-1180 Ball Diff assembly AE91717 steel idler 57-6000 5x10 bearings (4pcs) 57-6001 10x15 bearings (2pcs)