Comes with the DT466 motor with an allison automatic transmission. Everything ran when I parked it. I just bring in semi's on grain now. Great mixer on the back. There is a hole in the sliding gate that could be mended. Inside dimensions of the box are 91.5 inch width 64 inch depth 189 inch length. It does taper down toward the bottom. I just put batteries it runs great. PTO, augers, gate and discharge hydraulics work as well.