Dexron or Mercon III or one that is compatible with those two types. Power Steering takes Type F Transmission Fluid.
Mercon
Dex\Merc
The Ford Bronco transmission can use any SAE certified transmission fluid. Ford transmissions manufactured before 1979 will need an F type transmission fluid.
I'd suggest using a Dextron III/Mercon automatic transmission 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.
dextron
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.
dextron III
Auto
The fluid that is typically orange in a Ford Bronco is the transmission fluid, specifically if it uses a type of automatic transmission fluid (ATF) like Mercon LV or similar. Additionally, coolant in some models may also have an orange tint, especially if it uses a specific type of extended-life coolant. It's essential to consult the owner's manual for the correct fluid types and colors for your specific model year.
Dexron 3 is prefered.
It's an automatic.