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I opened the cover and found 41 teeth on the ring gear and 16 on the pinion...so 2.56:1. I unfortunately couldn't find the date casting, however I saw where one may have deteriorated beyond recognition on the fwd middle flange adjacent to the other casting serial #.

Thanks, I'll open it up soon and report the findings. I'll also look for the date casting.

Hi guys, new to the forum. Got a tip from a friend that this site knows rears. I also have a 12 bolt that I've had trouble identifying. It has serial #3917124N and code "LJ1116K" stamped on the tube. Can't seem to find the date code casting?? According to one source online the serial # indicates a ...