DON'T DO IT!
My buddy at work just got rid of his fullsize with the 4.7 auto. he hated it towing for the shifting issues. he couldn't get it reflashed and the thing was pig on hills. he just got rid of it and got a hemi truck. its way capable then the 4.7 in the full size.
ps, the dakota 4.7 is flashed different so its a totally different ride.