Changing transmission fluid, what types, synthetic or not?

2006 TOYOTA SIENNA
140,000 MILES • 3.3L • V6 • 2WD • AUTOMATIC
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PEGMARTIN
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No problem, I just want to know if it's wise to go ahead and change fluid and go to synthetic.
Jan 3, 2022 at 2:56 AM
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ASEMASTER6371
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Good morning,

Synthetic is not standard for this transmission.

If you were to want to replace it, it will be difficult. The torque converter contains six quarts that cannot be drained unless it is removed.

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

I would just use the recommended fluid and stick to that.

Roy
Jan 3, 2022 at 3:04 AM
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PEGMARTIN
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Thank you very much and have a great day.
Jan 3, 2022 at 3:29 AM
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ASEMASTER6371
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You are welcome.

Always glad to help.

Roy
Jan 3, 2022 at 4:51 AM