I've only had to drain the tranny twice so far, so I choose not to drill a hole in the bottom of the tranny. The fill hole plug can be removed with a 3/8 inch drive bit. Its on the forward face of the tranny (driver side). Find a sturdy plastic bottle (if its too flexible, the vacuum will compress it), a flexible hose that fits through the fill hole, and a vacuum cleaner. Put a hole through the upper side of the bottle and push one side of the hose through and tape so there are no leaks. I put another hole in the top of the bottle cap and sealed the vacuum hose to the top of the bottle. I jacked the car up so I had some room to move the hose around within the tranny. Turn on the vacuum and keep moving the hose around until you have sucked most of the tranny fluid out. I am usually able to get about 2 quarts out. If I recall the tranny holds about three quarts.
To fill the tranny, I use the same hose and a funnel that fits within the opening of the hose. The tranny is full when the fluid is even with the bottom of the hole. You can do a search of the different ATX fluids people have tried. You have the option of drilling a hole in the bottom of the tranny, fluid changes will be quicker, but I didn't like the thought if I messed it up. It might be different if the tranny was out of the car I had a spare tranny case.
To fill the tranny, I use the same hose and a funnel that fits within the opening of the hose. The tranny is full when the fluid is even with the bottom of the hole. You can do a search of the different ATX fluids people have tried. You have the option of drilling a hole in the bottom of the tranny, fluid changes will be quicker, but I didn't like the thought if I messed it up. It might be different if the tranny was out of the car I had a spare tranny case.