I'm not sure if this has been posted before but I had trouble finding a way to get Torque Pro App to have a Transmission Fluid temp gauge pre 2012 Petrol Wranglers.
I manage to set up the App today and went for a hard 4x4 in the Glass House Mountains. It was scary how much the Tran fluid went up on the Hwy with 34" x 12" tread on and then when I was off road and taking it slow and hung up on shit scary angles the temp was over the top.
On the Hwy the temp ranged from 160c to approx. 180c however the top temp I saw was 207c but it may have gone higher as the app was turned off for a while.
If you want the App just go to the Custom PID set up under Settings and fill in the fields as per my screen shot.
Here's a screen shot of the custom PID setup.