A833 cast numbers
You will find on the right side of the tranny case a machining pad with all the info you need,if the info is their,post it,if none is there,then it is a replacement unit.
http://www.slantsix.org/articles/4-speeds/ODA833fourspeed1.htm
If you go to this site you can help ID your tranny by parts that are on it.If you post the tranny cating numbers on the pad I will decode them for you.Mrmoaprtech