Good read on the 68RFE. The versions of the 8 speed that come in the 1500 5.7 & Ecodiesel and I’m assuming the 6.4 is rated to 520 TQ. FWIW I do have an engine & transmission tune in my ED. About 465 TQ as conversion to how Ram would rate it. Truck is used to tow TTs & boats daily and especially across the west.
This transmission has been great up & downshifting, quick crisp shifts, no hunting, pulling grades plus it’s held up 592k now. No repairs 5 fluid changes 3 filter changes. Truck has towed to almost 16k CVW over 6 percent grades. I think it will prove a game changer for the 6.4 2500. That’s not to say that the 68RFE doesn’t work just fine in the flats and with moderate weight especially if it’s not pushed hard.