Factual error: The locomotive in Ponyboy's dream of his parents' death in 1965 is a Burlington Northern C30-7. Burlington Northern did not begin operations until 1970 and the C30-7 was not built until 1967. In the same scene, the locomotive's stripes and cab numbers are mirrored.
Factual error: The story is set in 1965, yet it shows many modern (as of filming in 1983) pieces of medical equipment, such as disposable plastic nasal cannula, modern plastic IV tubing and cut offs, etc. Also most hospitals in the 1960s still had open wards with many patients cordoned off by curtains, instead of private rooms as depicted in the movie.