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Seafoam Trans Tune for 200K mile Gen 3

Discussion in 'Gen 3 Prius Technical Discussion' started by donzoh1, May 30, 2023.

  1. donzoh1

    donzoh1 Active Member

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    I recently changed the transmission fluid in my 200K mile Gen 3 which I believe has had a rough life. It was darker than I expected and I'm sure the new fluid will be a step in the right direction. I was thinking of using a cleaning product like Seafoam Trans Tune prior to the next fluid change to get rid of some varnish which I'm sure lurks within the CVT. Is it better to do this proactively or wait until it starts acting up or neither? I've always used Seafoam products in motors but haven't in transmissions or transaxles.
     
    #1 donzoh1, May 30, 2023
  2. ForestBeekeeper

    ForestBeekeeper Active Member

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    Is this the first time that your Tranny fluid has been changed?

    How much longer are you thinking of going before doing this proposed SeaFoam cleaning?
     
    #2 ForestBeekeeper, May 30, 2023
  3. CR94

    CR94 Senior Member

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    I very much doubt that's a good idea.
     
    #3 CR94, May 30, 2023
  4. donzoh1

    donzoh1 Active Member

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    I don't know about prior changes because I just recently got the car. I'm guessing it might have had one or two before this. I'd probably wait 30K or whatever the suggested interval is unless I think it's slipping.
     
    #4 donzoh1, May 30, 2023
  5. Grit

    Grit Senior Member

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    o_O
     
    #5 Grit, May 30, 2023
  6. nicoj36

    nicoj36 Active Member

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    No need for transmission cleaners or additives. Just drain and fill with fresh new fluids.
     
    #6 nicoj36, May 31, 2023
  7. CR94

    CR94 Senior Member

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    No change interval is suggested by Toyota.
     
    #7 CR94, May 31, 2023
  8. Grit

    Grit Senior Member

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    Because it’s life time fluid! No need to change it, the landfills will be mad
    At you!
     
    #8 Grit, Jun 1, 2023
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