there is a drain plug on my 91 civic's auto transmission.
1) turn the wheel all the way to the right.
2) remove 3 plastic screws holding a plastic shroud on, behind the right wheel. fold back the plastic shroud out of the way (unless you're feeling really ambitious and want to undo the other screw which is buried somewhere underneath the car.)
3) insert ratchet into drain plug (half inch i'm guessing? i forget what size those are) and about 3L will come out. if you're feeling anal then you will find 3 tubes with small bolts on the end which will release an additional 100mL of fluid or so if you're lucky.
4) the drain plug is a magnet. notice there is metal paste on the end. clean this out and reinstall. refill with dexron, making sure the level doesn't go above the full mark on the dipstick. on these cars you don't run the engine to check the fluid.
as for the filter 'screen'.. good luck. i've only heard of such a device and you have the remove the transmission to get at it? this is why they make aftermarket filter kits for these transmissions.
[ February 04, 2003, 05:47 PM: Message edited by: Dr. Pepper ]