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2013 P85 transmission service

Discussion in 'Model S' started by Mysterylectric, Oct 3, 2017.

  1. Mysterylectric

    Mysterylectric Supporting Member

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    So I recently did the fluid service in my 2013 P85. Service was done with about 18.5k miles on the replaced drive unit. The service itself was very straightforward, and I have the video linked below. However, after having the fluid analyzed by Blackstone labs, the iron content in the fluid is about 700% the global average, at 142ppm. Everything else falls within the "acceptable" range for a first service, IMO. Does anyone have a definitive answer about the iron content (normal, not normal, it's about to explode), or am I the guinea pig here?

    Video -
    Screenshot_20171003-011714.jpg
     
    • Love x 2
  2. demundus

    demundus Member

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    I love this video. People are so scared to work on these cars, they really aren't that much different.

    That's all I wanted to say. Thanks for making it.
     
    • Like x 1
  3. Chaserr

    Chaserr Member

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    I love that you're doing these videos, please keep it up!

    I can't offer anything to actually contribute here, but I wanted to make sure you know your efforts are appreciated.
     
  4. AmpedRealtor

    AmpedRealtor Well-Known Member

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    Are you saying the high level of metal is indicative of something bad with the DU?
     
    • Like x 1
  5. Mysterylectric

    Mysterylectric Supporting Member

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    I'm asking if the arguably extreme iron content is normal for a first service, or if it's indicative of an imminent failure of a transmission component. I'm making zero assumptions, because I don't have any data to compare it to.
     
  6. Mysterylectric

    Mysterylectric Supporting Member

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    Thanks for good words!
     
  7. jaguar36

    jaguar36 Active Member

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    Are Blackstone comparing this to engine oil? They seem rather confused since they do say its a Tesla transmission, but then they say "If this is the 2nd or 3rd" fluid change. that's a bizarre statement for transmission fluid. And they suggest checking it a gain in 18.5k miles? Those sound far closer to engine oil intervals than transmission fluid intervals.
     
  8. 182RG

    182RG Free The Service Manuals From Tyranny

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    I use Blackstone for UOAs on airplanes and cars. They have a "benchmark" analysis of clean Dexron VI, as they indicate on the report that is the fluid in use. If they have received other UOA requests from other Tesla DU changes, then they incorporate that into the analysis.

    If they don't, it's possible they are treating it as a "transmission", and applying this generically to their advice.
     
  9. demundus

    demundus Member

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    Even so, what would be the chemically relevant purpose to elevated iron levels in a viscous lubricant meant for high temp operation?
     
  10. Mysterylectric

    Mysterylectric Supporting Member

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    Look at what they are seeing. The car has 54k miles and the oil has 18k. Their assumption would be that it's been changed once prior (as there isn't enough room on the form to give a whole rundown).
     
  11. Mysterylectric

    Mysterylectric Supporting Member

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    This is what I'm trying to find out. The service centers don't analyze the fluid, so they have no idea if the elevated iron is normal for first service, or if there's an underlying issue. I may elevate this through tesla service to see if I can get any further info, but last time I did, they told me that servicing my own vehicle can void my warranty.
     

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