Transmission fluid for a 1947 Farmall Cub

I have two manuals for my 1947 Farmall Cub. They specify different transmission oil requirements

3.5PT. of 1H Hy-Tran Fluid
3.5PT of SAE-80.

Which one should I use?
 
use 3.5 pints of hy-tran
take the cover off of the trans and make sure the small drain holes are clear on top of the shafts.
pictures and lots of info at farmallcubdotcom
good luck
Ron
 

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