I have a 2013 1500 with the 4.7L Flex-Fuel engine and 6-speed tranny. There is a pronounced "bog" or hesitation when coming off the line when the tranny shift from first to second. Sometimes it's worse than others. Dealer clams they submitted a "Star" inquiry and were told it was a specific program to extend tranny/gear life. I find this a probable fob-off from the factory. Any similar experience with your drivetrain, and any fixes?
We do torque manage the engine (momentarily reduce engine torque) during the last half of power-on upshifts, including the 1-2. Your dealer should be able to monitor the amount of torque reduction using their scan tool (this variable is called Delta Torque and is in Nm). They can also monitor the actual engine torque (called Actual Torque [in Nm] or Engine Torque [in ft-lbs]). They can also monitor the trans input torque (called Turbine Torque I-Gear and is in ft-lbs). So they could drive with you and record these values, then show you the actual amount of torque reduction, and how long it lasts for (typically a few hundred milliseconds). They could also see if they are in line with other similar trucks.
I have a ram 2013 4.7 who do the same thing between the 2rd and 3rd gear like a bogging sound. Do you learn something new from your dealer. I already went to my dealer and they found nothing but i think it's not normal.