Hardest working truck I ever owned. In 7 yrs and 150,000 miles the only repairs, out side of standard service items, were ball joints, 4 spark plugs blowing out of the head and the front left universal froze. The the 5.4 has pulled over 8,000# with barely a whimper. In the hills of western PA that is a real job. I have pulled trees,traveled to the bowles of earth and traveled to 1/2 of the States with it and always made it home. I blame the spark plug problem on the mechenic that did the plug change. I tapped and inserted heli-coils in the bad holes and had no furthed problems. I replaced all the plugs my self at 140,000 and have not had further problems. So I am sure he did something wrong.
