Ok, 2001 Ford F250 with the 7.3 engine. 363,000 miles.
I knew something was going to get me and it turned out to be the tranny. Theses trucks are notorious for transmission problems.
The question is, how much, on average, will a transmission repair cost? The truck is only worth about $6000. Am I totalled?
Hell yeah my man! You should definitely consider posting some pics throughout the process!
One invaluable trick I learned when going into a big auto project: As you remove bolts, push them through a piece of scrap cardboard in the same configuration as they are on the vehicle, and label the cardboard with the location and a number that indicates the order each set of bolts was removed in. I've torn apart entire engines with zero experience and put them back together with nothing but this trick and some torque specs.
Also, the following advice might be insulting if you're otherwise good at working on vehicles, but its worth putting together a list of all the tools you'll need before you start pulling things apart. There's probably dozens of forums and youtube guides that will have that info.
Good luck! I'm no expert, but feel free to ask me questions as you go!