Prius Differential vs Transmission?

Discussion in 'Gen 4 Prius Technical Discussion' started by pnw_jk, Feb 22, 2022.

  1. BiomedO1

    BiomedO1 Senior Member

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    See my comment on #13 - It only requires ONE drain and fill; unless you somehow contaminated the ATF.
     
  2. ChapmanF

    ChapmanF Senior Member

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    By golly, it is three times in the manual:

    • You do steps #1 to #10 the first time, as steps #1 to #10. That leaves you drained and temporarily refilled and idled for 30 seconds.
    • You repeat steps #1 to #10 in (k). That leaves you drained a second time, temporarily refilled a second time, and idled for 30 seconds a second time.
    • You repeat steps #1 to #3 in (l). That leaves you drained a third time.

    Then you reinstall the drain plug for real with a new gasket, and fill for the third time.
     
  3. Mendel Leisk

    Mendel Leisk MMX GEN III

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    That's a flush, lol.

    I skimmed that, in the fourth gen RM, concluded "there be dragons" (to borrow Bob's expression).

    Third gen, it just says the aforementioned double check of fluid level, which I resolved to not do, after the first time. I suspect there's some proof-reading, back-room engineer, who keeps piling on additional silliness, with each successive gen.

    I actually resorted to such a flush method, with an Accord: inadvertantly started pouring motor oil in (to the transmission), got about a cup in before I woke up. So three drain and fills, with a drive around the block after each fill. Then a fourth and final fill.
     
    #23 Mendel Leisk, Nov 26, 2025 at 11:40 AM
    Last edited: Nov 26, 2025 at 11:50 AM
  4. BiomedO1

    BiomedO1 Senior Member

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    LoL; in your defense - the old Honda manual transmissions did take 30wt motor oil; NOT gear oil.:whistle: Too much LSD or shrooms.......:rolleyes::D
     
  5. ColoradoBoo

    ColoradoBoo Senior Member

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    Really? Sometimes you wonder if engineers are just messing with us! My buddy at work brings his Ford Maverick over to use my Quick Jack to do his tire rotations and oil changes and it has one huge undercarriage cover you have to remove just to do an oil change....14 torque bolts! WHAT??? Oh and his steel wheels have to be torqued to 150 ft/lbs....that's crazy tight!! (Makes me worry about warping the rotors.)

    At least it's pretty light....the steel skid plate underneath my Tundra is never fun to replace after doing an oil change. You have to line up the holes to get the bolts in there....need 4 hands!!
     
  6. Mendel Leisk

    Mendel Leisk MMX GEN III

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    I can manage bonehead maneuvers even when sober.
     
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