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Changing fluid in the Gear box , part or Model S drive train.

Discussion in 'Model S: Driving Dynamics' started by nolngrgrsngslde, Jul 21, 2013.

  1. nolngrgrsngslde

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    This video shows a technician saying that the gear box of the Roadster has oil in it and it needs to be changed every two years or so.
    http://www.youtube.com/watch?v=Ggoi0OBhVSQ&feature=youtu.be

    I was wondering if anyone heard of something like it for the Model S.

    Once every two years seems close to the same interval for changing engine oil when using synthetic. My 5 series only needed it once every 1.5 years. If this is true, it puts a big damper on the idea that the model S does not require oil changes.

    Transmission fluid is changed once every 10 years. My 5 series has 180k on it and i have never changed the Transmission fluid. (Transmission made by GM, BTW)

    I may have to change my name from "no-longer-greasing-slide to hell", to "Sometimes greasing slide to hell", if this is true.

    Perspective anyone?

    Thanks.
     
  2. qwk

    qwk Model S P2681

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    I think it's 150k miles or 12 years.
     
  3. callmesam

    callmesam Member

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    No fluids to change except the fluid that the batteries sit in. Those need to be changed every 150K miles or so.
     
  4. Cheerose

    Cheerose Member

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    And windshield washer fluid... :)
     
  5. captain_zap

    captain_zap Electron tamer

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    The Model S has a conventional differential that presumably requires 90W gear oil. The service checklist (attached) says 12 years, 150k miles for this item.
     

    Attached Files:

  6. Doug_G

    Doug_G Lead Moderator

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    No, it does not have a conventional differential. It has a transaxle gear box. The entire drive train has six moving parts - just like the Roadster.
     
  7. captain_zap

    captain_zap Electron tamer

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    I stand corrected, then.
     
  8. dhrivnak

    dhrivnak Active Member

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    And it does contain synthetic oil and it should be good for at least 150K. 2 years is a bit on the extreme side. My Roadster is now 5+ years old and they never suggested that this be done.
     
  9. nolngrgrsngslde

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    good to hear. Thanks guys.
     
  10. Botbldr45

    Botbldr45 Supporting Member

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    Never had that mentioned to me either .... Even before MS when everything was Roadster in service centers.
     
  11. jerry33

    jerry33 S85 - VIN:P05130 - 3/2/13

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    What's really needed is some laboratory analysis of the fluid. Toyota says much the same thing for the Prius' transaxle, but laboratory analysis shows that you should change it at 5,000 miles and then every 40,000 miles as it loses a lot of lubrication qualities and gets contaminated with dust.
     
    • Like x 1
  12. rdrcrmatt

    rdrcrmatt Member

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    This is exactly what I was hoping to hear. Now where can we get the spec for the oil in the MS? And where are the drain and check/fill plugs? I'd send some oil out for analysis in a month or two.
     
    • Like x 1
  13. stevezzzz

    stevezzzz R;SigS;P85D;SigX

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    Doug, please list the moving parts; I've been telling people it has six moving parts, I'd like to be able to tell them what they are.
     
  14. qwk

    qwk Model S P2681

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    image.jpg
    Here is a pic from the roadster.
     
  15. Doug_G

    Doug_G Lead Moderator

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    Three shaft gearbox, per above picture. Two axles. I believe that leaves the motor shaft.

    (Of course we're not counting the individual balls in the bearings!)
     
  16. Francis Lau

    Francis Lau P-1456

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    And yup, don't starting them cause the MS has lots of balls!
     
  17. cheshire cat

    cheshire cat Member

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    did you take this any further would love to know cheers CC :)
     
  18. brianvicars

    brianvicars Member

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    Bump. Ok, I am receiving mixed information on the type of oil that needs to be changed in the Model S & X motor gear boxes. Some say it is Dexron VI others say it is Mobil SHC 629 synthetic gear oil. The quantity is 1.4 quarts each but does anyone know which oil to use? My model X is coming up to the 12,500 mile change recommendation.
     
  19. ecarfan

    ecarfan Well-Known Member

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    There is no "12,500 mile change recommendation" for the S/X gear box that I am aware of. Please provide a source that supports your statement.

    See the PDF posted above by @captain_zap which shows that the differential oil is changed at 12 years/150K miles.
     
  20. NOLA_Mike

    NOLA_Mike Grouchy

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    It's recommended by the new "Maintenance Plans" that just came out: Maintenance Plans

    Screenshot 2017-03-29 09.14.03.png
     
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