Re AOD you also want to see this... important info...
•Try to avoid pre-1988 models without rear-lube enhancement. It is likely that planet bushing damage may have already occurred, mandating expensive new gear-train parts as well as an updated output shaft.
•1992-93 E and F series trucks (those with AOD’s and not E4OD’s) contain the strongest production AOD transmissions. Included is the two-inch wide overdrive band (part of the Motorsport Wide Ratio Kit, which is highly recommended for full-throttle use of overdrive or towing in overdrive) and the now-famous "A" overdrive servo.
•All Thunderbird SC supercharged V-6 transmissions contain the "A" servo (its original application) and the strong H.O. V-8 style clutches but still use the 1.5-inch overdrive band.
•In situations other than those listed above, any 1988 or later V-8 AOD transmission (steer clear of the base V-6 units) should prove adequate for most AOD buildups. Base V-6 AOD units have the weakest "C" servo, and most V-8 units to include the H.O. Mustang have the "B" servo.
Also be aware that in 1991, production began on the AODE which is the computer controlled AOD, and was used from 1991-2004. So there was some overlap in production.