I have a 2004 f-250 4wd 5.4 with 130,000 miles. trying to get ready for the spring season and am trying to get as much maintenance done this winter as I can. Just did the trans fluid/filter, battery, plugs, rotors, changed the rear oil and did fuel filter.Did the ball joints last year. What else does anyone recommend that I might be missing? I tow my dump trailers with this truck so its my main vehicle and it gets alot of use, about 25-30k miles a year. Thanks.