 I bought this truck used with 54000 miles on it. It has severed me well. It has 178000 on it now. The trany went at 101000. After 75000 you should keep a extra ignition coil in the garage, you will need it. The 4x4 is amazing, I have never been stuck  anywhere,and I go off road alot. She hauls an amazing amount of weight. I was looking to replace her,but I will hold on until the last heart beat.She's just that good.Change the oil every 3000 and trany 30000 and she'll treat you right.5.4L rocks, I can get 18 mph if I drive normal. It usually gets 16 mph.