You may very well be correct, as I said, I may be wrong.

here is where I got the info:
http://www.carcare.org/Auto_Transmis...lexplate.shtml

 

ok, well never EVER use that source to help you work on your car LOL

 

It's called a flexplate flywheel and the ring gear is on it.

 

Well, I stand corrected.
Not that I didn’t trust the “dude your wrong, trust me� argument. I have always been one who liked a more technical consensus when answering a question.

From my checking…yes a flywheel is normally associated with a Manual transmission and a flex plate is normally associated with the automatic.
It also seems that the words are interchanged quite a bit based on who is speaking.

The flex plate is similar to the flywheel. The flex plate is not as strong and as thick as the flywheel. The flex plate is used with the automatic transmission where the torque converter is a unit fixed to the flex plate.
The flywheel is thicker and stronger is designed to take the repeated abuse of the clutch engagement and disengagement, and its weight helps maintain rpm through shifts due to its inertia.
Both the Flex plate and Flywheel act to transfer power from the engine to the transmission.

 

^ exactly

 

Just for the record, Ford called them all flywheels in the 65 to 72 service parts book. Flexplate is not mentioned. I'll still call the thing a flexplate to indicate it goes on an engine with an automatic transmission and I imagine that the guys behind the parts counter will understand, and that's what counts.
Jim