I know much of this information is well known to our members, just my humble findings. As a former owner of 4 Cummins (two duallys) of different generations, the last 2015 3500 crew cab, SRW, 6'4", Aisin, and a recent 2018 g56 same configuration, I know many may be thinking why?, I seldom pull any trailer over 16k, the Aisin was great, no problems, just the $2600 price tag, (which none of my local dealers would give any premium at trade for it), and the every 30,000 mile maintenance, never could break the tires loose empty, but always pulled well, in my opinion the Aisin make the most sense in a dually pulling 30k, not a srw as the gvw or tire rating will run out, and the DOT will inform you about that before you will get to use the full potential of the Aisin in a SRW, thats why I went back, all my others were manuals and rowing the gears in a SRW with a no cost g56 is fine. Other points of interest, that nice front fold down arm rest with 3 drink holders disappear with the g56, (the arm rest stays, shorter) gone is manual idle up with the cruise buttons, also gone is TIP starting with the g56 ( turn the key to start and let it go, stays cranking until it starts auto only), Auto and g56 you can turn on the hill start assist, so you don't have to 3 pedel it with a g56 on a hill starting out. I do order CD players on my Tradesman's, not for the antiquated discs to listen to, but you get lower middle cushion fold up storage for the player to be installed. I did order dual alternators for a trailer winch, and also about the def heater working much better with that option as my 2015 tank froze solid and took 3 days to thaw out, this info came from the Ram truck regional service manager. My recent truck 2018, was also ordered with work grade vinyl and a vinyl floor, which I found to my displeasure when you order a vinyl floor Ram does not provide the cover over the jack and tire tools like my 2015 had with carpet $30 ordered a new one, parts checked the VIN, yup never had one. Hope this info helps, if you would like to check out my fake 2018 black sport 3500, it is on page 3 of gen 4 forum of Lets see your gen 4 trucks. Thanks!