When i try to shift to reverse, I get a blinking R on my dash as well as the shifter and reverse does not work. It will also do this on N and D but not always. Sometimes I can turn off and back on and N and D will will work but never Reverse. Any thoughts?

 

Seems like a electronic issue in the TCM. there are many reprogramming TSB's for the MY 2014.
Here is a List of all the TSB's for the 2014 Durango https://www.carcomplaints.com/Dodge/...bs/index.shtml

Here is a TSB talking about not being able to shift out of Park
https://static.nhtsa.gov/odi/tsbs/20...62946-0335.pdf