Swapped bad AX4N tranny for a 2002 AXOD. No Overdrive

I realize now that I should not have attempted this swap. However I was in between jobs and on a tight budget. My neighbor had a 2002 Taurus he was parting out and I thought I found a good deal.

Long story short: the AXOD required different CV axles (non ABS) and transmission mount from the donor car. Drives okay, but will not shift into overdrive.

Without knowing any better I attempted to swap ECMs and making things even worse. Theft system pretty much executed a "self destruct" command and made it where I had to tow it to the Ford dealership and they recut a key and flashed the original ECM. They were aware of the transmission swap. $435 later I got to drive the car home, but still wont shift into overdrive. My bill states nothing regarding my swap and complaint. I guess after 3 months down I was just happy to be driving it again.

Any suggestions or modifications perhaps in the wiring harness I can try?

Thanks for your help.