dana 60 i think

bill of material number should be stamped on one of the tubes

BOM number can be decoded at dana/spicer website

http://www2.dana.com/expertforms/deabill.aspx

for instance, my axle tube on the rear i got from a 1-ton 1980 dodge van had this number on the passenger side tube: 603994 1

also, my ring gear had this stamped on it: 41-11

that is the ratio 41 / 11 = 3.727272727 (3.73:1)

i thought my numbers were gone from the tube also, but after searching and searching and searching i found them