40040694 AAM GM/Dodge Nickel Plated Slip Yoke 1485 1480 30/31 Spline 40040961, 40022508, 74082508 -- .615" or 41MM = INTERNAL MAJOR SPLINE DIAMETER 29/31 = SPLINE COUNT ( MAY HAVE 1 OR MORE "DEAD" SPOTS ) 9 53" or 242MM = CL to End 2.2" or 55.9MM = GROUND HUB SEAL DIAMETER