It's usually the solenoid pack, very easy to change!
Pull trany pan . (Outside)
Pull the filter and filter pan. (Inside)
Pull the solenoid cover X a whole lot of screews(will need a tourx bit.)
Unplug side connector(outside)
Pull and replace the solenoid pack!
Repeat installation in reverse!
Don't forget to fill with new +4 trany fluid!
Results:
Shifting and bog down issues gone, trany like new!
About a 220 dollar fix! Unless you can find the trany solenoid pack cheaper!
Shops will charge a ton for simply changing out the S pack!
It is very common for Ram S pack to go out.