I use type f with 1 qt of engine oil mixed in.
Read that tip in Chrysler Power Magazine years ago.
It was from a guy named Marv Booth who ran torqueflite Specialities in Cali. a noted race trans shop.
Used the 1 qt oil trick in all my vehicles since then , all brands and years.
Never had a tranny I did this to go out while I had the vehicle either