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Thread: Transmission fluid temperature question

  1. #1
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    Transmission fluid temperature question

    Does anyone know how much theoretically will be the difference in reading temperature from automatic transmission sensor and the pan?

    I suspect they should +- 5c difference. But if someone experimented with this would like to know.



  2. #2
    Administrator MetroMPG's Avatar
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    Is the sensor data available via an OBD-II reader? (I'm not sure)

    If so, you could use a cheap OBD bluetooth dongle and free smartphone app to monitor it.

        __________________________________________

        click to view fuel log View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...


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    Senior Member MrMicra2015's Avatar
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    i don't think that's monitored and there is no thermostat in an auto trans cooler so why would the car care ? and what would it do in response?
    2015 Micra S (manual)
    no A/C /no power options
    Feb 2015 build
    9,999 purchase price + tax..no additional 1600$ because it was a 2015 purchased in 2016
    so receipt says $8,399....+1600 .... so they look good i guess...for a brand new car!

    Covid 19...she up on blocks!!!

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    Administrator MetroMPG's Avatar
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    Well I.know some people add aux transmission coolers... but usually only those with extreme duty (e.g. towing in the mountains).

        __________________________________________

        click to view fuel log View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...


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    I think pretty much anything that comes with a "tow package" has a transmission cooler and likely the ability to monitor it. That being said vehicles that come with tow packages usually have the ability to tow. The Micra does not. I have a bluetooth OBD-II reader and the transmission coolant temperature is not available.

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  7. #6
    Administrator MetroMPG's Avatar
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    Thanks for that info (OBD).

        __________________________________________

        click to view fuel log View my fuel log 2015 Micra S manual: 5.0 L/100 km ... 56.5 mpg (Imp) ... 20.0 km/L ... 47.0 mpg (US) ...


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    Well, transmission temperature sensor is on transmission the sensor exist. If you cant read through obd scanner that doesn’t necessarily mean that there is no sensor that means that your scanner cant understand that pid and decode it.

    I already checked and difference is 2-3c degrees which is acceptable.



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