DOT 3 brake fluid
It all depends on the type of transmission the truck has, if it is manual than manual transmission fluid is used where if it is automatic, automatic transmission fluid is used Not always, my 91 302 with a 5 speed manual uses auto fluid, a lot of manuals do.
Mercon
Dex\Merc
I'd suggest using a Dextron III/Mercon automatic transmission fluid.
The Ford Bronco transmission can use any SAE certified transmission fluid. Ford transmissions manufactured before 1979 will need an F type transmission fluid.
Mercron / Dextron III
any kind it doesnt really matter
Dexron or Mercon III or one that is compatible with those two types. Power steering takes Type F Transmission fluid.
E4OD. Electronic 4 Speed with OverDrive.
Type F
Type F automatic transmission fluid meets or exceeds all lincoln, ford, and mercury type automatic transmissions regardless of year. Brands are a mercon V or Halvoline.