John Deere 4.270 Late OEM Crankshaft Remachined 30/10 Rods & Mains 4 Cyl Diesel AR40485, R40570, R46498 4.270 ESN 280001 & up. Includes balancer drive gear. #3 Rod has Staining * Flange: Centering Ring, 4 Bolt Holes, 1 Dowel Holes * Snout: 1 Bolt Hole, 1 Key-ways, Stepped * Stroke: 4.750" * Rod Journal: 2.9980-2.9990" * Main Journal: 3.3715-3.3725" * 5 Mains * With 2 Helical Gears