85 ranger trasmission issue

I have an 85 ranger 2.8 v6 and when I bought it they said that the trasmission had been replaced. I am trying to find out if it is a 3 speed or 3 speed with overdrive. It runs great but never shifts into overdrive. Cannot tell if it is trying to and cannot or if it is not trying to at all.

Any help wouold be appreciated.

The numbers on the actual trasmission are p-85gt-7006 ARR (or ABR) 1-6069d f2