PPS039 Grublock Motor Mount for Traxxas Sledge (With RX Box and Custom MMX8s ESC Mount)This is the PPS Grublock motor mount kit for the Traxxas Sledge with RX ESC Mount. The FOR MMX8s ESC option will include the RX Box, ESC tray AND a Castle MMX8s specific hold down and switch mount. (Below) This is not your typical motor mount. It moves your motor from the front of the truck to the back and it gives you the freedom to mount so many more motor sizes in your Traxxas Sledge. Not only that but you get the fine adjusting and gear mesh