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.