Anyone with 46re experience?

Not an expert but the pressure solenoid and pressure sensor have caused me some issues before on a 99 Durango I had. I was told at that time to use Mopar components, guess due to variances in resistances in after market stuff. Also if I recall correctly the throttle position sensor plays a part in the shifting also. It’s easy enough to check if you have an analog style volt/ohm meter. Here’s a quick kind of troubleshooting guide on the transmission.

http://www.atraonline.com/gears/2006/2006-10/2006_10_46.pdf

I also recall there being some issues when I was digging around for info on the Durango with the power train control modules failing. But those usually caused a check engine light. Not much help but maybe point you in a direction from my experiences.