I sent you a pm draggula. here is hopefully some helpful info.
The AOD transmission was used until 1993. the AOD transmission used two input shafts. one for 1st 2nd and reverse. in theses gears you always have a "fluid connection" and can stop at a light without killing the engine. you also have torque multiplication in theses gears. when the transmission shifts into 3rd it releases the fwd clutch pack and apples the third gear pack, way in the back of the trans. power is now being transfered through the second or inner most input shaft (this is the long shaft that can be removed or falls out of a AOD).
When a AOD trans shifts to 3rd, you loose the "fluid connection" (this is why the vehicle falls flat, or like it looses torque). The input shaft on a AOD is splined directly to the back cover of the torqueconverter, so when ever the engine is running, the input and the direct (third) drum is spinning.
Some high performance AOD torqueconverters used a input spline that combines both inputs. You can identify which one you have by placing the long input shat into the torqueconverter and seeing if it locks to the converter, or if it spins without the converter spinning.
Precision sells this converter both ways. The one with the input spline combined drives way better, but you will loose gas millage and heat the trans fluid up.
The AODE trans has no "TV" or kick down linkage as some call it, and the input shaft is ground smooth at the last 1" of the shaft. This transmission uses a clutch inside the converter to give you a 1 to 1 connection between the crankshaft and input shaft of the transmission. When you use a smaller dia. converter, the clutch dia also gets smaller. higher quality converters make the clutch apply area wider to make up for the loss. they also use a front cover that is thicker, to dissipate heat generated from the clutch. the thicker cover also doubles its purpose as a ballooning plate.
hope this info helps-rich