This is a used input gear shaft out of a John Deere 425 garden tractor rear end. This part will also fit a 445 and 455 tractor. I could not find a part number for this input shaft but it fits onto the rear end input gear which the part number of that gear set is AM878401. The shaft appears to be in good shape the splinesdo show a litttle wear as can be seen in the pictures. (26B)