1936 and 1937 housings are different.

And, the carrier assemblies are different.

That does not mean the ring/pinion are the different (search that manual at the link-s above) - there are labeled diagrams. Or, call Patrick and ask him (or did you ask him already?).
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36 and 37 R&P look to be different?

Last edited by tclederman; 04/13/2011 10:21 PM. Reason: added R&P link
Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.