Here's my take on Dodge automatics...having driven a tuned 68RFE, a 47RE with all the goodies, and a 47RH with a mild build...if you want it to shift when you want, and never have to mess with goofy shift points once you have it setup, then swap it for either an NV5600, or trade the truck for a Duramax/Allison and you'll actually have something that shifts decent.
I was NEVER happy with shifting in any Dodge automatic, PERIOD. The 68RFE was best once I got the MCC tuning and played with shift points, but I could still never get what I wanted between towing and empty. And none of the 47/48 series transmissions ever did anything close to what I wanted, so I shifted them manually towing and at the track. When you're modifying everything so far past factory, you can't expect everything to work together perfectly.
Just my
Chris