Disconnected speedo cause no Overdrive?

I have an 82 supra auto with a digital dash

recently did a transmission swap and while i was hookinng up the cable, i must have pulled the speedo out of the guage cluster.

when driving the transmission shifts smooth up until i get to OD.
I'm stuck in 3rd.

Could the sensor in the guage be linked to my overdrive?

I bought a new cable, as mine did not have the retaining clip on the guage end (hence being pulled out), but i have not had the time to install it.

any thoughts, I'll be tearing into it soon, but i wanted a little bit of foresight...

Thanks
Michael