Tim,
I opened the site you posted above. I have a question for you.
The Manual says the 1/2 & 3/4 ton trucks left the factory with
Hypoid Axel-SAE 90 in the axles & transmissions. The last paragraph says
"all transmissions had SAE 90 Transmission or Mineral Oil Lubricant" Is this a misprint or is the Hypoid Axel-SAE 90 and SAE 90 Transmission or Mineral Oil Lubricant the same thing?

I'm restoring a 1946 & this is of interest to me.
Thanks,
Harold