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Changing transmission fluid, what types, synthetic or not?

Tiny
PEGMARTIN
  • MEMBER
  • 2006 TOYOTA SIENNA
  • 3.3L
  • V6
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
No problem, I just want to know if it's wise to go ahead and change fluid and go to synthetic.
Monday, January 3rd, 2022 AT 2:56 AM

3 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Monday, January 3rd, 2022 AT 3:04 AM
Tiny
PEGMARTIN
  • MEMBER
  • 2 POSTS
Thank you very much and have a great day.
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Monday, January 3rd, 2022 AT 3:29 AM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Monday, January 3rd, 2022 AT 4:51 AM

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