I'm starting to troubleshoot some shift issues I've been having and noticed that the Trans Shift Mode is always 4WD. How is this determined by the PCM/TCM? My initial thought was the Transfer Case Switch but it reads correctly.
The 4WD mode explains why I'm having issues with it not always downshifting to 1st when I come to a stop so I think its a good place to start troubleshooting. Log from this morning attached.