I changed the transmission fluid today on my 2003 LX470. Once the pan is emptied and refilled, I found it was exceedingly easy to just let the transmission pump out about 2 quarts at a time from the tranny cooler in front. Disconnect the bottom hose from the hard pipe (it has the angled out hard piece) and place into a half gallon jug that can conveniently sit on a small ledge inside the bumper. I found disconnecting the power steering cooler right hand bolt (10mm) allowed enough movement for easy access to the hose.
Run the engine enough to fill 2 quarts, empty, add 2 quarts, repeat until fluid runs clean, you run out of fluid, or you decide it's time to be done. I use about 10 quarts total.
One thing I was surprised to find is there is no thermostat to bypass on this model/year. My 2008 Sequoia has a thermostat to be bypassed on the transmission housing. Later years using ATF-WS may need that done to get good fluid flow.
Hopefully this helps someone.
Run the engine enough to fill 2 quarts, empty, add 2 quarts, repeat until fluid runs clean, you run out of fluid, or you decide it's time to be done. I use about 10 quarts total.
One thing I was surprised to find is there is no thermostat to bypass on this model/year. My 2008 Sequoia has a thermostat to be bypassed on the transmission housing. Later years using ATF-WS may need that done to get good fluid flow.
Hopefully this helps someone.