If you have either the 3/4 or 1 ton axle, the ring and pinion kit will not work, as it is only for 1/2 ton rearends. The number you posted is a casting number, the ID number should be stamped on the top of the carrier at the right side, and should be a 2 letter/3 digit code, example; "XX 123". The only gears available on 3/4 and 1 ton were 4.56 and 5.13, respectively.


Bill Burmeister