I was using the wake up and extended PID formula on my HTC M8 for trans temp, but after upgrading to a Google Pixel and updating the app, I noticed they added the trans temp for Jeeps by default when you add a display. It's labeled "[CHRYSLER]Transmission Temp (Jeep Pre 2012)." They also have it for 2012 and later. Have you tried that option? I've only used it a few times but it seemed the same compared to when I was using and wake up and PID function originally.