Is there a kill switch or sensor in the 2000 Galant transmission that would cause it to stop moving if low on oil?
no, maybe a second gear lock that is activated if computer gets
code from transmission.you can still drive it but slowly.if it just
stopped you obviously need to refill tranny,i suspect you have
"possibly" done damaged to tranny if this condition has happened.
You can try dropping tranny pan .changing filter and putting in new
transmission fliud.then see if it comes back to life.