I had a 2004 Ford F150 Supercrew 4x4 5.4 triton. While it does ride good and was very quiet, I ended up getting rid of it because of several factors, one of which were the problems I had with it (First year model, but 06 models still had alot of the same probs). It never really seemed to have the advertised power (alot of guys were getting good results with tuners), the rearend was rebuilt at 6k miles and was starting to act funny at 12k miles, the brakes went out one day at 730 miles and then magically never did it again, and there is a major issue (IMHO) with the 5.4 3v spark plugs rusting into the head and shearing off when trying to change them. Many on the forems also had a severe vibration issue, but mine was very smooth on the highway and around town. Aside from this it did drive nice and had a great interior and still got 18 MPG on the interstate with a 2" lift in the front. I know they were having problems with the Titan rearend and now see them with cooling fins on the diff pumpkin, but man are those diffs. small....Good luck!!!