Re: Sienna 2000 transmission fluid change related question
I'd like to know the answer to these as well, since I'm planning on starting to do something similar for my 2007 LE. So if some more knowledgeable gurus can answer that would be great. Though by reading through the other forums, I noticed a few things regarding what you are doing:
1) Most people that drain through the plug get about 4 qts out, and they say that's about half of the total. Since you only drain 2.5/8 qts, that's only about 30% of new stuff, and 70% old stuff. Initially it should be fine but I'm not sure if that would be enough as the years go by. The last time you did it, when you looked at the fluid what did it look like compared to new fluid? Also did it smell burnt or something.
EDIT: Actually I just saw in another post that says there's 12 qts of ATF fluid in total, which would bring your numbers to 20% new stuff. I'm not sure which value is correct as I don't have an official spec on it.
2) Since you say that the pan was cleaned, but didn't mention about the filter. Does your model have a metal mesh type filter? It seems some models have a mesh filter which can be cleaned, and some have a paper filter which needs to be replaced. In anycase, I would think that cleaning/replacing the filter would eventually be necessary.
3) Just curious, what problems are you seeing now?