Join Date: Jan 2008
Location: Northeast of Dallas TX
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Toyota does not recommend a machine flush for WS fluid equipped transmissions in spite of what the dealer/garage says. The chance for overfill or underfill is great and they are VERY sensitive to the amount of fluid in the trans. The person using the machine must be an absolute expert in its use and follow Toyota procedures exactly. Few have such a person on staff.
I got this information from a top ASE certified Toyota/Lexus mechanic in Austin, TX. He is one that is qualified but has seen too many failures from this procedure and refuses to do it. His recommendation is to drain & fill three times over a short interval and use nothing but WS fluid NOT an equivalent. Were it my vehicle I would not chance it.
Having said that there are several folks here who have used other than WS fluid without problems......so far. If damage is done it will be over the long term.
2008 Base V-6
2008 Limited V-6
Tow Prep Package & front wheel drive (both)