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2019+ External Transmission Cooler

Discussion in '3rd Gen Tundras (2014+)' started by chasenicholas93, Oct 17, 2019.

  1. Jan 18, 2020 at 4:19 PM
    #211
    chasenicholas93

    chasenicholas93 [OP] New Member

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    Gotcha. I didn't
    If you have a 2019+ you don't have a cooler, just a warmer.
     
    rockmup likes this.
  2. Jan 18, 2020 at 5:04 PM
    #212
    Ruggybuggy

    Ruggybuggy New Member

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    The cooler your looking at uses antifreeze from the engine to cool the oil in the transmission. If the engine temp runs at a stead 200F then when the transmission is colder the temp is brought up to a warmer temp. When the transmission is running warmer in the summer, say 220F, the excess heat is dumped into the engine cooling system. Liquid to liquid heat exchangers are more efficient than air to liquid. Some here are worried that the temps on the 2019 and 2020 may run too warm when towing and cause reliability issues.
     
    WNY PAT and AzureNightmare like this.
  3. Jan 18, 2020 at 6:25 PM
    #213
    WNY PAT

    WNY PAT New Member

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    And others worry that over time, with this design, the transmission fluid can mix with the antifreeze creating the “strawberry milkshake of death”... which is another way of taking out the transmission.

    I leased my 2019 for 2 years / 24K so I’m in this just out of curiosity... I’m sure it’ll be fine in the short term regardless of increased temps... and I do tow a lot with it... so it’ll make a good test mule. I also have a 2017... so this summer I plan to do some back to back testing just for fun.
     
    sask3m and Ruggybuggy like this.
  4. Jan 18, 2020 at 7:00 PM
    #214
    sask3m

    sask3m New Member

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    Well nothing has really changed as far as this milkshake thing cause the warmer has been cycling coolant on these trucks down there since at least 07.
     
  5. Jan 18, 2020 at 7:21 PM
    #215
    WNY PAT

    WNY PAT New Member

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    Ah. I thought that prior years it couldn’t mix for some reason.
     
  6. Jan 18, 2020 at 11:31 PM
    #216
    SnowLizard

    SnowLizard New Member

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    so it is a cooler, they just moved the 'radiator' coil (from the bottom tank) next to the trans... at least it's not running water into the trans itself, it's outside the trans, and the fluid doesn't have to go as far.

    I tow a 20ft 4k lbs camper trailer, it'll be interesting to see once I get a monitor for that (probably ultra gauge)... wish the built in dash could do that.
     
  7. Jan 19, 2020 at 7:06 AM
    #217
    Ruggybuggy

    Ruggybuggy New Member

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    That's the million dollar question. Does the 2019-20 need an additional cooler? Some members had reported higher trans temps than the previous years so the question that's debated is what is an acceptable transmission temp and will running the transmission warmer than previous years cause a reliability problem.

    To monitor you trans temps the cheapest way is to use the Torque or Fusion apps with an obd2 bluetooth adapter. Total cost is can be as low as $20 depending on what you buy.
     
  8. Jan 19, 2020 at 9:47 AM
    #218
    sask3m

    sask3m New Member

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    What about the big three do any of their trucks use a similar cooling setup or do they all still use external coolers? Of course we all know their trannys can't compete with the Aisin.:thumbsup:
     
  9. Jan 19, 2020 at 9:50 AM
    #219
    Cpl_Punishment

    Cpl_Punishment New Tundra!!!

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    Doesn't Ram use an Aisin transmission in their heavy duty diesels?

    This is what GM's website says their trucks have.

    Screenshot_20200119-104912_Chrome.jpg
     
    sask3m likes this.
  10. Jan 19, 2020 at 10:02 AM
    #220
    sask3m

    sask3m New Member

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    Yeah it's possible their diesel does use the Aisin. I thought they mostly used Allison but I'm not sure.
     
  11. Jan 19, 2020 at 10:06 AM
    #221
    Cpl_Punishment

    Cpl_Punishment New Tundra!!!

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    GM uses the Allison with the Duramax.
     
    sask3m likes this.
  12. Jan 19, 2020 at 2:34 PM
    #222
    chasenicholas93

    chasenicholas93 [OP] New Member

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    Okay, everyone. I can now say it's complete. I did the tempature check and only had to fill 1 quart of ATF. I went on a 1 hour drive while it was 62° outside going up and down hilly terrain with wide open throttle on a lot of them. Pan temp maintained 189-191° the whole time. The torque converter got up to 210° but quickly dropped to match the ATF temp within 15 seconds of slowing down or going back down a hill. The hill I was using was close to a 1 mile long. Me doing this prior to the cooler the pan temp would get to 220° pretty fast. The cooler does it's job. After the drive, the cooler was very hot to the touch and was dispersing the heat very well.
     
    Jorgy1, VRC, jtwags and 3 others like this.
  13. Jan 19, 2020 at 3:20 PM
    #223
    sask3m

    sask3m New Member

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    I take it you didn't have the thermostat pinned during the test?
    Nice to see the temp dropped quickly, must mean the thermostat is opening somewhere around that 210 mark?
     
  14. Jan 19, 2020 at 4:21 PM
    #224
    chasenicholas93

    chasenicholas93 [OP] New Member

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    I only pinned it for the ATF level check. During the test I had the pin out. Based on my results, the thermostat opens around 190°.
     
    Jorgy1, sask3m and TRD15559 like this.
  15. Jan 19, 2020 at 6:33 PM
    #225
    chasenicholas93

    chasenicholas93 [OP] New Member

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