Well, I had some issues at the Texas rally! Got there fine, then the next morning, truck wanted to lock into gear due to code 25 11. That is 0 reading from the Output Speed Sensor.
I did a bunch of stuff to try & get it fixed, including replacing what I thought was the speed sensor. No luck. Got a tip from the Facebook group that the speed sensor is internal and someone had a similar issue as mine. They let the truck get warm, revved it in neutral a few times, and got it to work. Out of desperation I tried it & it work. I got home! I have not really took the time to troubleshoot it all the way since I got home as that was a big disappointment/let down for the truck to do that to me.
But, I have done some reading & gotten a few more tips. It's a pretty in-depth troubleshooting process, so I am going to cover it in a video specifically on it's own, along with some FMTV transmission 101 type stuff as the setup in our trucks vs others in different due to the transfer case & not having an ECM in the vehicle. The TCM gets it's information in a much different way.