Looking at used trucks to replace my 4x4 03 4.7 quad cab with 180k miles. Probably gonna go with a 5.7 quad cab 4x4. I can find early 4th Gen and 3rd gen in my price range and mileage range. Anyone got tips on specific wear or problems to look for on these used trucks? Any reasons longevity or maintenace wise to go with a 3rd or 4th gen? Don't put a lot of miles so I keep trucks for a few years and generally haul only a small boat a few times a year. Thanks.