So I drained a little transmission fluid...

[Rednexus]

You can read it via a basic OBDII wifi/Bluetooth dongle and Torque Pro. There is a custom PID equation you need to type in within Torque and it will display it (the equation is common for most Toyotas - I think I grabbed mine from a Tacoma forum).

 

[SnoopisTDI]

I used something like this: https://www.amazon.com/dp/B00DMI632G?tag=ihco-20