I actually have a 2000 Civic
I actually have a 2000 Civic in my driveway we bought back in 2001, but it's a manual rather than the hydraulic auto shift which I believe was new in that generation. You sure yours isn't the HX though, with a CVT? I'm looking at the shop manuals for these years and its showing full trans flushes with filter screens for the automatics. They have a very small pan (only six nuts holding it on) on those little 4-speeds.