Nissan for a tow vehicle

I towed a 6100 lb trailer for five years with a 2015 Nissan Titan Pro4x that a payload capacity of 1658 lbs. . It was a very stable platform although the 5 speed transmission made it feel underpowered in hilly or strong headwind conditions. But when we decided to upgrade to a 2600RB by Grand Design I knew the Titan would struggle mainly do to payload. Our trailer’s tongue weight is 1050 lbs ready to go camping. I think the brochure lists it at 550 or so pounds. Never had a problem with either the 2006 or the 2015 Titans I had as far as reliability. They were both very nice riding vehicles. I know the 2nd generation were updated with more power. But I have read a lot of 2017 and 2018 Titan engines having to be replaced.