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Coolant running down transmission

Discussion in '2.5 Gen Tundras (2014-2021)' started by Haulmode, May 4, 2025 at 3:52 PM.

  1. May 4, 2025 at 3:52 PM
    #1
    Haulmode

    #1
    Haulmode [OP] New Member

    Joined:
    Jan 10, 2022
    Member:
    #72909
    Messages:
    38
    Gender:
    Male
    Vehicle:
    2021 CM SR5 Cement
    Bilstein 5100, Falken Wildpeak 285/75r18, Demello Rock Crushers, Tech12Volts Sound
    While running hoses for a trans cooler on my '21 with 51k miles, I noticed dried coolant around the "warmer puck" area of the trans. Could this be a valley plate leak, or leak from somewhere else? Debating whether to install the trans thermostat or not before I take it in for diagnosis.

    20250504_174319.jpg I did not see any signs of coolant leaking from up top or higher on the lines going to the warmer puck.
     
    Haulmode, May 4, 2025 at 3:52 PM
    #1
  2. May 4, 2025 at 4:10 PM
    #2
    MadMaxCanon

    #2
    MadMaxCanon New Member

    Joined:
    May 27, 2021
    Member:
    #63566
    Messages:
    4,343
    Gender:
    Male
    SoCal
    Vehicle:
    '21 CM SR5 4x4 6 seater
    Too many, but not enough....
    Could just be the o rings on the puck itself. If it is your install should fix it and if not, I doubt installing a thermostat would impact the diagnosis at all.
     
    MadMaxCanon, May 4, 2025 at 4:10 PM
    #2
    Haulmode[OP] and Mdl like this.
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