An AOD transmission can go into a 91 Bronco with a little fabrication.
the shift siliniod for AOD transmission is bad. it cost about 30 bucks and is usually special order
C-4 aod
c4-AOD
AOD
AOD
aode
3 1/2 pound
C6 or an aod
aod (C4)
Manuel transmission- Borg & warner T5 5 speed Automatic transmission- AOD 4 speed auto
install a well built C-6