I just traded in a 2004 F150 FX4 with the 5.4, 250,000+ miles, 90% of those miles pulling a 6x10 work trailer, trans went out around 100.000 miles, the rebuilt one was starting to act up and I had all kinds of elec problems, 10mpg, but the engine didn't use any oil and still had power, I was told I got lucky! Went with the silverado this time, a ton of power and great fuel mileage so far