stapler101 wrote:
I have a 2018 Ram 2500, diesel, short bed, "standard" rear end.
I am considering a 42 ft 5th wheel trailer with an empty weight of 12K.
Will my truck handle it on cross country trips with hills and mountains?
I can't really say without more detail on the trailer, but with bags or Timbrens your truck will handle that trailer as well as any same year SRW 3500. Just register it properly. As others have said the only difference in fourth gen Rams is the rear suspension (and the availability of the Aisin/HO CTD, which has nothing to do with load carrying capacity). I run timbrens on my Ram and I think they work great, particularly as they sit outside the coils so they effectively widen out the suspension.
That said, a DRW truck might be a better fit for cross country trips with a 42' trailer. If you are thinking of upgrading it would be a total waste to buy a SRW 3500 when $200 timbrens would accomplish the same thing.