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Tundra Transmission Cooler Kit

Discussion in '3rd Gen Tundras (2014-2021)' started by chasenicholas93, Jan 19, 2020.

  1. May 2, 2021 at 3:07 PM
    #631
    timsp8

    timsp8 Member

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    The transmission wants to be around 190. That’s where it stays on 07-18s with the factory cooler. Toyota planned on it being there with having the warmer attached to the transmission. 185-197 is perfectly fine. The cooler is there to dissipate the heat, but it still has to wait for the thermostat to open.
     
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  2. May 2, 2021 at 7:08 PM
    #632
    a522467

    a522467 Life’s short. Live now.

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    If you think you don’t need the cooler, you may want to think again. Gathering some pre-cooler data, I saw 228 degrees on the pan temp today just running to town and back. I wasn’t towing anything and had a light load (6 bags of mulch). 80 degrees ambient today in SE Ohio. I’m planning to haul a load of bricks to Oklahoma next month. No doubt I will finish up the cooler kit installation before then.

    D6DC9495-1EBC-41E9-9E1B-39098E178967.jpg
    E4969D0B-1145-424E-AB71-C8008EC15EE6.jpg
     
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  3. May 2, 2021 at 7:28 PM
    #633
    RollTide82

    RollTide82 New Member

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    80 degrees and 65 mph...I was running 217 with no payload. Gotta find a grand I guess and buy the cooler...
     
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  4. May 2, 2021 at 7:56 PM
    #634
    TILLY

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    Reading those PID'S seem pretty confusing when you look at the yellow and red zones respectively. Coolant temp. is absolutely normal, but is at about 3/4 into the red zone. Pan and convertor are in the lower red and yellow zone, but this is somehow abnormal? Can someone explain to me how this is a problem? :notsure:
     
    Last edited: May 2, 2021 at 8:01 PM
  5. May 2, 2021 at 8:09 PM
    #635
    a522467

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    Colors are arbitrarily set by whoever makes the dashboard. They can be easily adjusted.
     
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  6. May 2, 2021 at 8:12 PM
    #636
    TILLY

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    So you the owner can set the colors, or its set when you download it?
     
  7. May 2, 2021 at 8:18 PM
    #637
    a522467

    a522467 Life’s short. Live now.

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    It’s easy to change it in OBD Fusion. I just moved up the limits on coolant temp, since they were set too low.
     
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  8. May 2, 2021 at 8:28 PM
    #638
    TILLY

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    Doesn't that defeat the purpose of having the PID'S? I would think that the settings should be based on what Toyota has determined to be the average/optimal readings that are normal.
     
  9. May 3, 2021 at 6:07 AM
    #639
    JohnLakeman

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    The PIDs simply allow you to read the output to pins in a calibrated digital format.

    The dashboard has to be set up by the user to display that digital output using the options, typically analog/digital, starting/ending scale value, background color, overlay colors, etc available.

    Some of the numbers reported here raise questions in my mind about the PID used. Compared to the coolant temp, they look suspect to me. Good idea for dashboards to also show the coolant temperature as a reality check.
     
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  10. May 3, 2021 at 4:09 PM
    #640
    a522467

    a522467 Life’s short. Live now.

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    Curious what looks “suspect” to you? The fact that they’re hotter than you expected? I learned from another post that A/T Oil Temperature 1 is the pan and A/T Oil Temperature 2 is the torque converter. I simply picked them from the drop down menu. Thought it was pretty hard to mess that up, but maybe I did (?). What am I missing? Thanks


    E2BA5D56-DA9F-4E14-A83F-7690E5B95D39.jpg
     
    Last edited: May 3, 2021 at 4:53 PM
  11. May 3, 2021 at 5:08 PM
    #641
    JohnLakeman

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    My comments not directed at your data specifically, Michelle. I'm not sure if you've missed anything, but for some, maybe worth a double-check. In fact, not sure where I read it, but the temps I read looked low compared to coolant temp, but run-time may not have been considered. In a cooler installation setup, coolant temperature is going to be a very strong influence. It is not the final arbiter.

    On a very cool day, I would expect ATF temps to be below coolant temperature ONLY short-term. Once the engine coolant temp is stabilized on a long drive, I would expect ATF temperatures to be slightly above coolant temperature and variable within a set range according to load. That's just the way Toyota has set up the opening temperature on the transmission thermostat.
     
    Last edited: May 3, 2021 at 5:19 PM
  12. May 3, 2021 at 5:27 PM
    #642
    Vizsla

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    Her temps are without a thermostat, does not have a cooler installed. So probably reading fine imo..
     
  13. May 5, 2021 at 6:43 PM
    #643
    SShooterZ

    SShooterZ New Member

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    Hauling my 5,000 lbs boat in 70 degree weather. Never got above 195*.
     
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