Here you go!
I don't know about the 72 but this is what it says about the smaller tranny.
From my 70C and 71C (a very early)
Service Manual, "The properties of the
oil used in the
transmission are extremely important to the proper function of the hydraulic system. Therefore, it is extremely important that the recommended
oil, Automatic Transmission Fluid (ATF), Type "A", Suffix "A", be used.
The later manual says, "Dexron, Type F, or any hydraulic fluid which meets the C-3 oil specification is acceptable. Do not mix different brands. If
engine doesn't exceed 3,000 R.P.M., a premium grade 30 weight
engine oil is acceptale. SAE #40 and multi-viscosity oils are not recommended."
The later manual was published in August 1988.
Kind Regards,
JohnL