Tranny question Bill?

[Tholt34]

Bill,
I know you were at Ford for a while and I think i have an electrical issue with my tranny and I was wondering if you might have an idea. Here lately my Od light will flash when i come to a stop and it feels like the truck falls out of gear. You can barely role the truck and you will feel it set back down into first and shift fine through overdrive. No slipping or mis shifts or anything. Sometimes when you stop and put the truck in park it will rev up a couple hundred RPM and then drop back down to normal idle. Well the code I get is a P0720. I know this is the OSS and i first just replaced it. Still didn't fix it. SO i got a scan tool from a friend and started looking at things. Well i noticed with the scantool in datastream mode, the transmission gear says its in 2nd when and shifts 2-3-4-invalid. The transmission switch on the scantool reads correct to whatever I have the shifter in. So if i have it in overdrive it says overdrive, Man1 it says man1. So i'm wondering why my pcm is thinking the truck is in 2nd when i can feel the truck is physically in 1st and mechanically the truck shifts fine. Also when it feels like the truck falls out of gear and i can manually put the shifter in 1st and the truck goes into first and no issue. I have pulled the whole transmission harness out of the truck and checked for broke or cracked wires and ohmed wires out and have fount nothing.
I have heard of interference from like alternator or some power wires can cause issues with this but i'm just trying to pinpoint everything else before I go any further. Just wondering if anyone has heard of anything and I figured you knew the electronics pretty well Bill so i figured i would ask.

Sorry for the long post. Any info is greatly appreaciated.

Tim