Like others have said, I think each generation has its own unique set of problems, whether Ford, Dodge or Chevrolet, so that is one thing to research and see if it has been addressed on the truck you plan to buy. Personally I prefer the 94 to 02 Dodges. I would not consider a Dodge truck newer than 2007 due to the emission equipment. I have a 96, two 02s and an 04. All things considered the 02s are the nicest. The interior on the 04 is not as nice as the 02s.
