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2019+ External Transmission Cooler

Discussion in '2.5 Gen Tundras (2014-2021)' started by Genuine Cooling Systems, Oct 17, 2019.

  1. Nov 29, 2019 at 8:38 PM
    #91
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    Can someone take some photos of the atf lines from cooler to front of the truck please.
     
  2. Nov 30, 2019 at 5:24 AM
    #92
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    @panicman said to be patient. Everything will be a little slower during the holidays.

    I would just drive to the nearest dealer and find a used pre-2019 Tundra with tow package. Have a good look over and take some pics. If they ask, and salesmen ALWAYS ask, just tell them a relative likes your truck so much, he's wants to buy a used Tundra with the with 5.7L and tow package. I'm sure you will regret talking to a salesman, but what can you do...it'll be like chum in the water.
     
  3. Nov 30, 2019 at 9:42 AM
    #93
    panicman

    panicman Everyone remain calm.

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    I can do this today! Sorry- Thanksgiving Got in the way, and I didn’t have my truck with me.
     
  4. Nov 30, 2019 at 9:51 AM
    #94
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    No worries, I am not trying to rush anyone that's for sure.
     
  5. Nov 30, 2019 at 11:32 AM
    #95
    panicman

    panicman Everyone remain calm.

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    I hope these help. Without pulling the skid plate, here is what I have so far. For orientation, these pictures are taken from the angle of lying on my back under the truck. i am I setting these starting at the AT, and moving forward.
    349820E7-F644-4F34-BAE9-7F512803AB27.jpg The lines make an obvious gooseneck and head vertically.
    CA4EAE82-F99E-40A2-BC9C-8E3D27EBCD35.jpgThey are secured with a steel bracket. Immediately after the bracket, they have a slight bend.43B26EB4-EEF7-43E6-8C86-EF32B7349434.jpg They appear to transition to a hard rubber fitting that allows them to make a tight convolution that then leads forward.
    1129CD95-C131-4D0B-ADAB-776E8743A3F6.jpg
    and the final shot is them heading forward, but this is the last I can get without pulling the skid plate.

    54147BF4-47C1-4C31-B386-DC92768701A2.jpg
     
  6. Nov 30, 2019 at 11:56 AM
    #96
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    I believe what your looking at is the warmer lines not the cooler lines. I'll have to check under my truck now to make sure.
     
  7. Nov 30, 2019 at 11:57 AM
    #97
    ssls6

    ssls6 Dr. Awesome

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    I was able to look it up and it did coincide with the change. 2018 Tundras used R134a. I don't think it was an accident that they removed the cooler from in front of the AC evaporator. Something to keep in mind...maybe.
     
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  8. Nov 30, 2019 at 1:57 PM
    #98
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    The lines in yellow are the lines coming from the thermostat.

    20191130_135550.jpg
     
  9. Nov 30, 2019 at 2:01 PM
    #99
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    Just like this photo below, thel ines coming from the thermostat go through a metal bracket which I verified I do have then transition to the small lines that go to the engine bay.

    3A6282D8-AD02-4682-AD2E-8C73874CD814.jpg
     
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  10. Nov 30, 2019 at 2:03 PM
    #100
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    Cooler ATF lines at the thermostat connections (hoses at that point) are smaller diameter and appear to have a woven insulation on them in the vicinity of the thermostat. (Looks like you figured it out.) Insulation may be to protect rubber hoses from engine and exhaust pipe heat. See Snip for removal of oil cooler below...heavy arrows are at the ATF disconnect points. Routing is obvious by following the ATF lines along the engine.

    Hoses into the warmer are large diameter coolant lines and they go vertical, where at least one ties into the heater core supply line at the firewall. The second line heads vertical and then forward back to the cooling system.

    ...
    Snip 1.jpg
     
  11. Nov 30, 2019 at 2:06 PM
    #101
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    Do you have more diagrams that show the lines going to the radiator?
     
  12. Nov 30, 2019 at 2:08 PM
    #102
    JohnLakeman

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    Other end at the grille...bottom two lines shown are the ATF lines from the thermostat:

    Snip 2.jpg
     
  13. Nov 30, 2019 at 2:25 PM
    #103
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    For the remainder of connections at the exchanger, I refer you to the TundraTalk thread in Post 89. Or, if you're using the Toyota exchanger, the @ryanwgregg photos in Post 91. You can't really see how the connections to the exchanger are made in Post 91...may have to revert to parts diagrams from TOCS.
     
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  14. Nov 30, 2019 at 3:20 PM
    #104
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    After thinking about it. I am just going to order aftermarket ATF lines and run it straight from the thermostat to the cooler. With the OEM lines I believe it is restricting flow since the lines are smaller than the diameter of the thermostat ports. Additionally, since I will have to go aftermarket on the radiator, the skinny OEM lines will not fit in standard 3/8 radiator ports.
     
  15. Nov 30, 2019 at 3:24 PM
    #105
    blaserdude

    blaserdude New Member

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  16. Nov 30, 2019 at 3:38 PM
    #106
    Genuine Cooling Systems

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  17. Nov 30, 2019 at 3:39 PM
    #107
    JohnLakeman

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    Hose all the way is stupid easy. But...I don't think I could stomach using hose all the way to the front. I'm not even sure I like the way Toyota uses hose connectors, but it does look like they've put some thought into protecting the rubber from the heat according to need. That guy is zip tying that hose right to the engine. :eek: If he ever gets a hose leak from heat deterioration or road debris, when that thermostat opens, his ATF will be pumping straight out onto the ground. He'll never be wiser until the transmission quits. Well, maybe he will see the temperature gauge climbing in time.
     
  18. Nov 30, 2019 at 4:01 PM
    #108
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    Well going with a aftermarket radiator, which you kinda have to with 2019+, the OEM hoses are not going to fit nor reach exactly where you need them too. Finding good, high temperature rated hose and proper routing to avoid exhaust heat is probably the best option.
     
  19. Nov 30, 2019 at 4:04 PM
    #109
    blaserdude

    blaserdude New Member

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    Go with braided hose.
    bv
     
  20. Nov 30, 2019 at 5:55 PM
    #110
    JohnLakeman

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    :tumbleweed: o_O

    (1) Whatever conduits are used, adapting to the exchanger connections will be a challenge...easier for some than others. The B&M exchanger used by Krohis had classic 1/2" NPT threaded connections. Single 90 degree elbow (1/2" NPT to 3/4"(?) hose) adapters were used to make the connections. Elegant solution. Your 40K exchanger has 3/8" inverted flare connections...better start thinking about how you're going to get that hose to fit up and stay connected. Hint: You cannot clamp a hose on a straight tube, regardless of how well it fits, and be reasonably confident it will stay under pressure. There has to be a rib formed into the tube so the clamp has a little help (note rib in the thermostat tube connections). You will need a mating 3/8" inverted flare connector with a hose adapter end to fit the hose you choose (Hmmm, easy you say...Do they even make those?)

    (2) Minimizing the risk of conduit and/or connection failure is a priority secondary only to the original purpose of providing enough cooling to maintain reasonable transmission temperatures. Toyota engineers provided steel tubing in areas of high heat, and protected the rubber hose connectors with insulation where needed. The idea that these tubes will "restrict" the flow to something less than your transmission requires is ridiculous. Have you forgotten who designed the tube diameter?

    My opinion is that the further you stray from what has been engineered by Toyota, the greater the probability for a transmission disaster. I'll check in every now and then to see how this comes along.
     
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  21. Nov 30, 2019 at 6:19 PM
    #111
    Genuine Cooling Systems

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    "Have you forgotten who designed the tube diameter?" - Toyota designed it. Just like the designed a truck with a tow package and no tranny cooler.
     
  22. Nov 30, 2019 at 6:26 PM
    #112
    Genuine Cooling Systems

    Genuine Cooling Systems [OP] New Member Vendor

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    An elbow like this will work just fine. Just like the thermostat it has a lip on the end so the clamp/hose does not slide off.

    Screenshot_20191130-182140_Chrome.jpg
    Screenshot_20191130-182421_eBay.jpg
     
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  23. Nov 30, 2019 at 6:32 PM
    #113
    WrigglingWilly

    WrigglingWilly Well used Member

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    So, to sum this up, 2018 models with tow package have a cooler for the trans, but the 2019 models do not?
     
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  24. Dec 1, 2019 at 4:56 AM
    #114
    JohnLakeman

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    Seriously, you should rethink "blazing" this trail. Right now, your transmission is at less risk from overheating, than if you try to add a cooler. That's my penance for encouraging you. ;)
     
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  25. Dec 1, 2019 at 5:47 PM
    #115
    Genuine Cooling Systems

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    stuckinohio, Rica25 and sask3m like this.
  26. Dec 6, 2019 at 6:04 AM
    #116
    Genuine Cooling Systems

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  27. Dec 6, 2019 at 6:23 AM
    #117
    blaserdude

    blaserdude New Member

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    Looks good. What fittings does it use? Were they supplied?
    bc
     
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  28. Dec 6, 2019 at 7:18 AM
    #118
    Genuine Cooling Systems

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    It does not come with the fittings for the hose. It has 3/8 female fitting. I'm going to order some elbow fittings today as well as send measurements to a shop to make a custom bracket.
     
  29. Dec 6, 2019 at 7:25 AM
    #119
    blaserdude

    blaserdude New Member

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    NPT fittings?
     
  30. Dec 6, 2019 at 7:36 AM
    #120
    JohnLakeman

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    Before you order, you had better double-check the size of the threaded connections in that cooler. Those appear to be 1/2" FNPT (female national pipe tapered edited*) to me, which is a common threaded connection. Threaded pipe nipples and fittings are available in 3/8" NPT, most often in brass for air or gas, but the 3/8" size is not as common. I could be wrong because of the photo scale.
     
    Last edited: Dec 6, 2019
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