I went ahead and scanned the whole deal, it's the Eaton truck axles service manual an addendum from 1960. Covers single reduction, 2-speed axles, plaentary double reduction, D-series tandem, M-series tandem, axle shift systems, and all the specs. the addendum covers 3-speed tandem axles.
I've offered it up to the old manual project, but if anyone else would like a copy I can email it all at once. It's an Acrobat file, just under 83 MB. I also have the Eaton speed chart and a truck axle spec sheet from '64.
Let me know! smile

1956 GMC 370 dump " 'Tater "
1970 VW Volksrod "the Black Bomber"
2007 Chevy Avalanche
2020 Jeep Cherokee Trailhawk,
2005 Harley Davidson FLHTCUI

I dig all cars, old and new, whether they were hammered out of American iron, German steel, or Japanese tin cans. Being unable to appreciate them all is missing out on a world of great things.
But thats just MY opinion! :P