For accuracy's sake - Ford Type F ATF (the actual specification designation is Ford "ESW-M2C33-F", commonly referred to as "Type F" to differentiate from the earlier versions with their earlier - A, B, etc. - suffix designations of the ESW-M2C33 specifications as the spec was updated. While it is convenient to think of the 'F' as for Ford this isn't the reason.) does not have any friction modifiers in it. When it was shown by my company's (Exxon Chemical Company) chemists that one could formulate an ATF that met the GM and Ford ATF requirements with one additive formulation, Ford didn't like the concept of someone using GM's DEXRON ATF in their transmissions, even though all the test requirements were met. So, based on absolutely no technical reason, Ford inserted a single sentence into their Ford Type F specification that read..."This formulation shall not contain any friction modifiers".

All the above being said, I would use the most recent version of any ATF, since the test requirements - including the rust protection properties - for the ATFs are constantly being updated. You don't care about the frictional requirements of an ATF for an after run oil, you care about the rust protection during storage.