How many have changed their transaxle fluid?

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by jyii07, Mar 4, 2021.

?
  1. Yes

    8 vote(s)
    72.7%
  2. No - and don't plan on it

    1 vote(s)
    9.1%
  3. No - but will when I hit XXX miles

    2 vote(s)
    18.2%
  1. jyii07

    jyii07 New Member

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    My 2016 Prius is close to 110k miles now and I'm trying to decide if I should change out the transaxle fluid or not. I bought the car at 105k miles and dont think the fluids ever been replaced and I think I heard somewhere that you should only change it if it was changed earlier at like 30k miles. Some people say "life time fluid actually means lifetime fluid" and don't plan on doing it. Others say to do it every 100k miles. What are your thoughts?
     
  2. jerrymildred

    jerrymildred Senior Member

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    Most of what I see here from people who change transaxle fluid seems to be fairly early; around 30k miles or maybe earlier with repeated changes on a regular basis of something like 60k mile intervals. That's not official; just an estimate. The main idea being to get out the break-in debris. My personal opinion given the construction of the transaxle is that after that first change, you should be good to go for the life of the car. Not everyone agrees with that, though. There are loads of discussions about it on the forum.

    • My '05 had just over 100k on it when we got it. I never changed it. Traded it in at 150k.
    • My wife's '07 had 98k when we got it. I changed transaxle fluid a about 118,500. Traded it in at 138k miles.
    • My '13 PiP had about 53k on it when we got it. I also changed it soon afterward. Traded at 89,700.
    • My '17 Prime had about 23k when we got it. I changed it at 37,600 miles. It has about 49,250 now.
    • My wife's '17 trim 2 had about 20,500 when we got it. It's about 23k now. We haven't changed the fluid yet.

    No transaxle issues with any of them. I'm just a little fastidious about preventative maintenance. That got ingrained from 23 years of manufacturing experience.
     
    #2 jerrymildred, Mar 4, 2021
    Last edited: Mar 4, 2021
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  3. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    I found that Toyota engineers felt it was 100,000 service. Discussion here convinced me to change at 30,000, then 100,000, then theoretically every 100,000 miles.
     
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  4. ETC(SS)

    ETC(SS) The OTHER One Percenter.....

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    My company does not change the fluid for their fleet Priuses....but they usually offload them after 10y or 200,000 miles. My last one was exchanged for a non-tracking-device equipped replacement at 160,000 on its original fluid. My present ride is at 120,000 on its original fluid - and probably getting close to the tip-over point.

    I personally would lean towards a 30,000 mile to 50,000 mile initial fluid change (DIY with OEM fluid) and probably every 75,000 to 100,000 miles thereafter.

    YMMV
     
  5. jyii07

    jyii07 New Member

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    Yep, that's exactly what I heard too. 30k miles and then every 60k or something like that. Appreciate you posting the history of your cars..

    Thanks, that's what many people consider toyota meant when they said "lifetime"... lifetime = 100k/10yr

    Cool, thanks
     
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  6. David9962000

    David9962000 Member

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    So you guys get it done at an independent shop? Since Toyota says lifetime fluid. And you use Toyota fluid?
     
  7. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    I use Toyota fluid at a Toyota dealer. They tell me it is unnecessary, then take my money. About $100.
     
  8. jerrymildred

    jerrymildred Senior Member

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    I use the Toyota fluid ... in my garage. Super simple job if you have four jack stands.
     
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  9. thomassster

    thomassster Member

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    The transmission is very different than typical other Toyota’s so it doesn’t follow the same routine. Let the car care nut speak.

     
  10. Mendel Leisk

    Mendel Leisk Sunday driver DIY’r

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  11. Prodigyplace

    Prodigyplace Senior Member

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    I would never trust that to my local dealer. They messed up the first free maintenance inspection on my Prius I might drive 150 miles to a known good dealer though.
     
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