"It is preferable to flush the transmission and replace all the fluid this way, rather than just draining the small amount of fluid in the pan. The vast majority of the transmission fluid is trapped in the torque converter and the valve body and is not changed by draining the pan only. I have been told that it is unnecessary to change the filter in the transmission. It is wire mesh and only meant to keep chunks of stuff out of the valve body."
The above info was posted by BrianR in his "Corolla FAQs and Information" link. He posted on how to flush the tranny simply by removing one of the hoses and starting the engine for ten to 15 seconds to drain some fluid into a milk jug, etc, stop the engine, replace an equal amount of fluid, and so on and so forth until the fluid comes out red. I just need to see a diagram of those hoses so I can be sure to remove the correct one.?