my buddy has a 97 f350 4wd 7.3. i did all the work on it for him, and with him when something went most of the time other than oil changes, and easy stuff like routine maintenance. i could pretty much tell you every single thing done to it, and the mileage approximately cause i'm weird about remembering that stuff. it's got like 290k or so on it now. at 60k something. he smashed up the grill, and the radiator, and broke the cooling line to the transmission. he kept on riding too so he overheated his trans, and lost all his trans fluid cause i think he busted the pan gasket, but he got that taken care of at some shop his friend owned because he had full coverage, and it was reported an accident.
i think i helped him replace the camshaft position sensor at 70k something. this was over 7 years ago, so i don't remember exact mileages there. all i remember at the time was the engine light was on, and we read the codes, and it pulled up the camsensor. we replaced it before it showed any symptoms of it failing. at the time neither of us even knew what a camshaft position sensor was. we never had one in our other vehicle. we knew what the camshaft was! just not the sensor. had to reference his haynes manual to find it.
original water pump went at 137k.
he has his own garage door business on the side, but worked with the carpenters union too. one day he asked me to drive his truck from jersey to fairfax virginia to pick up doors for real cheap at this wholesaler. i wound up going two times that week. on my way out of there the first day the engine light came on. nothing out of whack. once i got back to jersey scanned, and the camsensor again. had 180k something by this time. drove all the way back down there two days later on a bad one. it stalled a couple of times, but nothing too bad. he bought a new one, and we put it in the next day.
original alternator went at 203k i think.
another transmission at 256k or so.
here is where it gets interesting though. second water pump went at 274k. after that something was going every couple of thousand, and still is. i did a heater core for him at 277k. a bunch of oil leaks, that he took care of himself.
original starter at 280k. he had someone up by where he lives do the turbo a couple thousand later. first it lieaked, and they stopped it, and the turbo went.
287k fuel pump went. i don't think this was original he had the original one changed when the bed was off. it took him 2 months to pay for the part, and i loaned him my 6.0 i don't own no longer which when that started to have problems he was driving it. i had to pull him with my 6.0 f350 to another friends house and left it in his garage until i was able to drive a rollback a friend of mine has. i put it in finally, and then once i started driving it for a few days before i gave it back it started making noise. carrier bearing went and the driveshaft fell off. i fixed it.
that same week another camsensor went, i had to change the battery cables because they were deteriorated. oh and the hubs were bad, and we replaced those. so at 290k or so he seems to be putting money into it every week or so it seems. a cruise control fuse went somewhere a few years ago, and was bad for 3 years before he fixed it. power window switches too. i forgot to mention somewhere in there maybe shortly after 200k he had his friend who owns a shop replace all his universal joints, ball joints, and shocks.
i have a 2000 with 124k miles, and everything is original except for one camsensor somewhere at like 80k something, and the transmission which i replaced at 109k miles. my best friend is the original owner, and he signed it over to me a few months ago while the transmission was already toast. we put the new one in together. with the way he is on transmissions i can see why it only went 109k haha.