Hey fellas, new to this forum but on many other automotive forums, My brothers jeep is a 2010 wrangler rubicon, car has about 70k miles on it, did a lot of snow plowing and pulling over the years, and the transmission does a lot of up and downshifting on the highway like it doesn't know what gear to hold. i keep getting transmission faults, P0734 gear ration incorrect in 4th, P0882 TCM power input low, p1790 Fault immediately after shift. The car runs fine and then goes into limp mode after about 10-20 miles, limp mode leaves the car with no throttle the car stays at idle. when i shut the car on and off it then lets me get out of limp mode and home, and or to my shop... This car has big 35" tires, lifted. LASTLY the engine codes I'm retrieving are from the PCM, there is no communication to the TCM. is the Transmission control unit and engine controll unit shared? I was not getting 3 volts on a back prob test on the power line to TCM but it looked like its just 1 computer when I checked. Let me know which direction to take!