I acquired a 1957 CJ-5 recently and have started a frame off renovation. My manuals do not list the volume of oil for the Dana 27 and 44 differentials that the '57 CJ-5 originally had. Any suggestions for a good shop manual/ maintenance manual that would have such info in addition to just how to take parts apart? The front differential has no tag, and the only numbers I found were on the side of the ring gear "SALISBURY 17483 A3R55 43-8 G", and "16380" cast into the bearing caps, and "17038" in raised numbers on an outside case flange. Similarly, the rear differential had no tag, but had stamped on the ring gear "L 6 12 53 SAL 18530 B3R51 43 8 ", and "15388" cast into the bearing caps. Neither differential had "DANA" stamped anywhere, so I need enlightening on what these numbers mean and whether they are original DANA or replacements. I'd appreciate help in sorting this out. Cheers, Tom Wright