Ok, I went backbuttwards in my search for the O-Ring pn;
check w/local Ford dealer parts folks for;
Ford Part Number: -W705409 SEAL - RUBBER
This genuine part is manufactured and warranty covered by Ford
See attached diagram from which I obtained the PN W705409 SEAL - RUBBER
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E4OD solenoid body connector seating by SeattleFSB
Section 07-01A: Transmission, Automatic, E4OD http://www.diesel-dave.com/vehic/manual/stj/stj71a22.htm#extract_1030
leakage is found by the solenoid body connector, refer to Main Control Valve Body in the In-Vehicle Service portion of this section. Replace O-ring on the connector snout of the solenoid body assembly.
"...Main Control Valve Body
NOTE: If a transmission has been disassembled to replace worn or damaged parts and the valves in the main control valve body (7A100) stick repeatedly from foreign material, the torque converter (7902) must be removed and cleaned by using a mechanically agitated cleaner, such as Rotunda Torque Converter/Oil Cooler Cleaner 014-00028 or equivalent.
1.Loosen the two transmission heat shield bolts using an 8mm socket. Remove the transmission heat shield (7A434).
2. CAUTION: Do not attempt to pry tab with pry bar or screwdriver. Remove the transmission heat shield from the transmission before attempting to remove the connector.
NOTE: Check electrical connectors for terminal condition, corrosion and contamination. Repair or replace as required.
Remove solenoid body assembly connector by pushing on the center tab and pulling on the wire harness.
.... skipping to;
16.Completely seat solenoid body connector into solenoid body assembly receptacle by pushing on top of connector. Audible click indicates full connection.
Was looking at that o-ring with the parts guys at my local dealer, we just weren't sure if it was the seal I was looking for. The 1 diagram looks like it had some sort of tub going to it.