Sorry for the double post.Thanks vgr that is very helpful.I imagine I would be safe if I had the trans changed at a lexus or toyota dealer; it seems logical they would use the fluid you reccomend.
As for the radiator stuff, my 1st post afew mo's ago was on how the radiator light comes on very briefly.I did add some anti freeze.I followed the instructions on the owners manual so I used the antifreeze mandated by the manual.However I did mix it with tap water.However the overfill reservoir was already practically full so the amt of water probably equaled lees than 1 1/2 cups.
My brother did maintain the car very well(he now has a 99400ls) and it is my intention to treat the car very good as well so I do appreciate the expertise and suggestions from everyone here