I have a 2017 Titan XD gasser. It is at 55k miles, and I have had no powertrain issues. Previously I have had three other Titans over the years: a 2004 model with 170k miles, 2006 model with 100k miles, 2007 model with 160k miles. All had treated me well for the time I owned them, and none had powertrain issues. Obviously I have confidence in the brand since I keep buying them. I cannot say anything about the diesels as I have zero experience with those models.