Big block 727 transmission

This is an as built from the factory transmission from 1975. Dodge truck/chassis model as used under motorhomes.
My best guess would be it is not.
I don't really know what a lock up is or if they were even available back in 75?
I don't believe I remember hearing the term lock up till later.
Sorry to sound so ridiculously stupid on the subject
but you got a 30+ year 4-speed only guy here.
This is the only automatic transmission I have and don't know much other than what I posted above about it.
If someone who knows more and can help out with a definite answer please feel free to chime in.