Fits John Deere 6.404, 6.466, 6076 Crankshaft Remachined 10/10 Rods & Mains 6 Cyl Diesel AR96189, R26560, R56919, R56934, RE63451, RE53422, R63451 6.404 ESN 215000 & up and 6076 ESN up to 187657, Timing Gear installed, L-Hand Helix, 23 Teeth, 23 mm wide, part #R105488 | Flange: Centering Ring, 6 Bolt Holes, 1 Dowel Hole | Snout: 2 Keyways, 1 Bolt Hole | Stroke: 4.750 in | Rod Journal: 2.9980-2.9990 in | Main Journal: 3.3715-3.3725 in | 7 Mains