Be careful on this. I did it to myself . I install my transmission back on my 89 bronco and found out I didn't lock in the converter right and damage it. Cost me an extra $700 to repair the pump and new converter had the same systems as you.
have your transmission and torque converter checked
10.5 Quarts if the torque converter is dry also.
An AOD transmission can go into a 91 Bronco with a little fabrication.
Ford discontinued the Bronco in '96.
a complete donor truck
The Ford Bronco transmission can use any SAE certified transmission fluid. Ford transmissions manufactured before 1979 will need an F type transmission fluid.
Its an A4LD.
I believe that is a ( C6 ) 3 speed automatic transmission with the 351 in a 1989 Ford Bronco
The C5 Transmission
Sure, but you will have to change many, many, many other parts along with the transmission. I would suggest purchasing a 1990 Bronco like yours that has a standard transmission to use as a parts car.