I've owned an '01 7.3L Excursion since I ordered it in "01. Now with 218k miles on her, she is as strong as ever. As has been mentioned, the tranny is the weak link, but they can be built with multi-disc converters and improved valve bodies along with a larger cooler and you are good to go. One other of the most popular mods is to change the springs out to an F25- set of springs. NO, they don't have the same springs originally as the truck. For around $800 you can have all new springs and u-bolts thaat you can put in yourself in the driveway provided a good jack and a good set of jack stands. If these trucks had come this way from the factory, they would have sold millions more as they make a HUGE difference in the truck. All '01 Xs need a Hellwig rear swaybar. About $175 and a coupkle of hours of your time and standard hand tools. These mods make this truck a true pleasure to own and drive. A very reliable truck. As I call it, the most capable SUV on the planet.