Need help with trans ID

[ame]http://www.mymopar.com/downloads/transguide.pdf[/ame]

Based off of this document which ends in '86 with 4412002 part number. To me suggests the date code and the 4431 of yours is likely a 88 model trans of origin unknown to me. See if you can find a VIN number on the other side on a small pad,