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Transmission cooler????

Discussion in '2nd Gen Tundras (2007-2013)' started by texas tundra 2013, Dec 1, 2020.

  1. Dec 1, 2020 at 6:50 PM
    #1
    texas tundra 2013

    texas tundra 2013 [OP] New Member

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    I have 2013 4.6 plan on towing a rv(4500 lbs dry weight) has tow package. I recently bought hayden 679 trans cooler.

    1 Should I connect in line with the stock A/C trans cooler.

    2 Should I delete the A/C trans Cooler and just use the Hayden Trans Cooler. It looks like if I got rid of rats nest of Trans hoses going to The A/C condenser that it would be pretty easy to mount the new cooler on passenger side. What ever advice would be helpfull. Also I plan to build bracket and not use the zip ties.
     
  2. Dec 1, 2020 at 7:01 PM
    #2
    yoshi82

    yoshi82 New Member

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  3. Dec 1, 2020 at 7:02 PM
    #3
    stuckinohio

    stuckinohio MGM Crue

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    I am not familiar with what trans comes with a 4.6l v8 but I am a supporter of stand-alone systems.
    If your truck has a trans thermostat like the 5.7's there is no reason to run it through the A/C.
    I would drain and cap original factory lines then run direct trans lines to cooler.
    A trans thermostat allows warm-up and prevents over cooling.
     
  4. Dec 1, 2020 at 7:26 PM
    #4
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    If you have the tow package on your 2013, you have the thermostat, connecting hoses, and cooler-pipe-assembly already installed.

    Do you suspect the OEM fluid cooler isn't up to the task? It might be worth using a ScanGauge to check your temperatures while towing before going to a lot of trouble. But, the Hayden 679 alone will have plenty of cooling capacity for your towing. As recommended, if you add the Hayden 679, just drain the fluid out of the AC cooler and install some plastic caps on the inlet and outlet tubes.

    Since you're planning to just add the Hayden 679 trans cooler, this thread shows a way to mount it:
    https://www.tundras.com/threads/add...oler-to-your-4-6l-tundra-for-under-400.77739/

    Edit: Since your truck is a Gen2, you'll need to confirm that the bracket configurations and bracket mounting points will work.
     
    Last edited: Dec 1, 2020
  5. Dec 1, 2020 at 7:39 PM
    #5
    texas tundra 2013

    texas tundra 2013 [OP] New Member

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  6. Dec 1, 2020 at 9:54 PM
    #6
    Dalandshark

    Dalandshark Infected with 5G

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    2nd gen transmission cooler thread: 4 posts... 3rd gen: priceless.
     
    The Californian and hagrid like this.
  7. Dec 2, 2020 at 5:11 AM
    #7
    Dr_Al

    Dr_Al New Member

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    Are you sure you need it? I know the weather down there is different than up here but I would pull a 26' enclosed car hauler every weekend with my 1st gen tundra without problem. Unlike my 5.7 that has a stand alone cooler it just went into the bottom of the radiator. I did install a temp gauge but it never got anywhere near hot enough to worry about. If you have the trans temp gauge in your dash then I would pay attention to where it sits normally and then try towing with it and see if it stays in the same place.
     
  8. Dec 2, 2020 at 7:09 AM
    #8
    timsp8

    timsp8 Member

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    Your advice is good, but that trans temp gauge is useless. It’s in the middle anywhere from around 150-240. By the time it starts moving, you are already getting too hot and would need to pull over. The light on my 2010 came on in the 250s. The gauge is about the same as a light. That’s probably why they got rid of it.

    I see why they did it though. Since trans temps fluctuate so much, you don’t want the needle bouncing all the time. People would be at the dealer all the time for issues that don’t exist.
     
  9. Dec 2, 2020 at 8:58 AM
    #9
    Dr_Al

    Dr_Al New Member

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    I'm not sure about the light but if it has a gauge then you should be able to use an app like Torque and your phone to watch what it's doing. I think you can even set it up so it records the highest value. Personally if the truck has an external cooler already I would service the antifreeze before replacing it since it does probably as much as the air flow to keep the trans temp steady.
     
  10. Dec 2, 2020 at 10:22 AM
    #10
    timsp8

    timsp8 Member

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    This is the gauge I meant was useless. The dash gauge. Others like an app or scangauge work good.

    928977B4-8550-465F-B2E7-8AAD7FB446C3.jpg
     
  11. Dec 4, 2020 at 4:53 PM
    #11
    Failure2comply

    Failure2comply Master HVAC Tech

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    I jump my thermostat "Open" during the warmer weather months. It makes a big difference feeding the front Trans Cooler, mine typically runs 30F-40F cooler when the T'stat is jumped open. The factory thermostat setting seems to be around 189-190F according to my Ultraguage Blue.
     
    rebmo likes this.

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