If you can break or wear out a 4.0 you should be ashamed of yourself.
Exactly. The straight 6-4.0/4.2 design is proven, with tons of aftermarket parts available. Just feed it fresh oil every 4 to 6k miles. I added a K&N washable air filter and 2” pipe, and get 23-25 mpg on the highway. The drive train is decent in the 90’s and early 2000’s vehicles, the bodywork is great, interior well done ... its a vehicle that, if you don’t trash it off-road, will easily do 200-250k miles before needing anything even resembling serious work.