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Trans Cooler added but took no Fluid

Discussion in '2.5 Gen Tundras (2014-2021)' started by nasher75, Jul 16, 2025.

  1. Jul 20, 2025 at 3:29 AM
    #31
    SoTexTundra

    SoTexTundra New Member

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    I as well noticed some strange behavior in my shifting after I did my dnf and wonder if I need to add a bit more fluid to mine like maybe a 1/4 to 1/2 quart more.
     
  2. Jul 20, 2025 at 8:18 PM
    #32
    2020_Tundra

    2020_Tundra New Member

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    MHX cooler documentation states the inlet is on the bottom with horizontal plumbing. With Hayden the inlet can be at the top or bottom, however, prone to having air trapped in the cooler if the inlet is at the top or if the inlet and outlet are both at the bottom.

    Also, the thermostat needs to be pinned when you do the level check to ensure transmission fluid is actively flowing through and filling the cooler.


    [​IMG]
     
    Last edited: Jul 20, 2025
    joseph_womack likes this.
  3. Jul 21, 2025 at 6:24 AM
    #33
    Chip_Tundra

    Chip_Tundra New Member

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    I have this cooler and ran the inlet on top with no issues. I recently switched to the suggested method and saw no real difference in performance. Either way, this cooler performs as it should
     
  4. Jul 21, 2025 at 6:44 AM
    #34
    reywcms

    reywcms New Member

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    Too many mods to come
    TC convertor spikes are normal. It’s converting energy which intern creates heat. Pan and tc temps will fluctuate from each other but when tc is locked that temp will decrease as normal.
     

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