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2019 2020 transmission cooler missing

Discussion in '2.5 Gen Tundras (2014-2021)' started by sgtfluffy16, Aug 10, 2020.

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  1. Aug 11, 2020 at 9:49 PM
    #151
    Green Thunder

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    Funny....I bet lawyers can argue you bankrupt about the cooler, but I've never found my tranny temp gauge.
     
  2. Aug 11, 2020 at 9:56 PM
    #152
    mountainpete

    mountainpete Explore more

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    Function before sparkle.
    Yup - that’s a fair point. Even the SR comes with it.
     
  3. Aug 11, 2020 at 10:04 PM
    #153
    Sumo91

    Sumo91 Busy with projects

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    Could you send a sample of fresh WS fluid to blackstone or another lab and get them to tell you the temp at which it starts to break down?
     
  4. Aug 11, 2020 at 10:59 PM
    #154
    TemujinNomad

    TemujinNomad New Member

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    These are my temps (2012) with mishimoto thermostat, new rad hoses, fresh coolant, drain and filled with amsoil atf a few times over the years and the cooler pinned opened. Unloaded, 90F weather, hour or so of driving.
    Loaded (500+ pds) coolant temps no higher than 190, trans temp no higher than 190.

    EF233C5B-FC55-4AC8-A6B5-A6488A2D6D70.jpg
     
  5. Aug 12, 2020 at 3:34 AM
    #155
    glowblue

    glowblue From time to time

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    I can’t find the Trans temp gauge on my 2019 SR either...maybe they added it on the 2020s?

    If we put our common sense hat on, and ask simply “why did the Toyota engineers redesign the external cooler for the 2019+ model year?” I don’t know the answer, but I don’t think it was just to remove cost. Especially on an aging Powertrain platform like the Tundra. The answer to that question would be very interesting to hear.
     
  6. Aug 12, 2020 at 4:44 AM
    #156
    Clemsonman14

    Clemsonman14 New Member

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    I have a 2020 SR5 with tow package. There is no trans temp gauge that displays on the DIC that I have found
     
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  7. Aug 12, 2020 at 5:19 AM
    #157
    ColoradoTJ

    ColoradoTJ Certified tow LEO Staff Member

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    https://www.tacomaworld.com/threads...e-get-it-out-of-your-transmission-now.331521/

    A good read.
     
  8. Aug 12, 2020 at 5:20 AM
    #158
    Dragracer_Art

    Dragracer_Art New Member

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    So you are running the 160 degree thermostat and have no issues ? No check engine light ?
     
  9. Aug 12, 2020 at 5:21 AM
    #159
    blanchard7684

    blanchard7684 New Member

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    This is correct.

    Other OEM forum folks have had success dropping trans temps doing some combo of increasing rear gear ratio and also lowering thermostat temp. Combining both really knocks down the temps.

    However in tracing the routing on the coolant lines to the existing warmer/cooler, it gets coolant flow from the heater core outlet.

    I'm building a parts list now to try to put a large heater core in line between heater core and trans cooler to drop coolant temps further.
     
  10. Aug 12, 2020 at 5:32 AM
    #160
    BENWALES

    BENWALES New Member

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    I'm gonna beat my chest on this one. 1st point, I'm a ASE Master Tech. 2nd point, I'm a Lemon Law Arbitrator. 3rd I'm a Technical Expert for my state. I've been in the automotive industry my entire life, I've worked with and against a great deal of the manufactures and proven using their data when a vehicle has a malfunction or when it has been consumer misuse and or abuse. I know the Magnuson-Moss act forward and backward (especially on modifications), I can almost recite the Lemon Law in my sleep (ask my girlfriend) I'm not worried. I'd bury Toyota on this just based on the window sticker, their own WS fluid max temp rating and the data that comes from their own CAN system that monitors, reports and records their data from their vehicle. There will NOT be a RECALL, this is not a safety issue. There may be a TSB or a customer support settlement (5.4L 3V Spark Plug Breaking in the Heads) for a cooler. Toyota knows they have a problem but the problem is likely less than 5% of the trucks sold. Keep your fingers crossed for a TSB or Cowboy up and buy a cooler kit from @chasenicholas93 and be done. The only way to screw up the install is to not add the addition 1.5-2 quarts of fluid, then it's on you. End rant, please leave me alone unless you have a failure that has been denied and are ready to make legal precedent.

    P.S. I'm not Pro Bono.
     
  11. Aug 12, 2020 at 5:33 AM
    #161
    blanchard7684

    blanchard7684 New Member

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    One thing to consider here with dropping temps too low or perhaps a technical reason to keep temps elevated...

    If it is the case ( I think there is alot of evidence it is) that the WS has some composition with a non trivial amount of polyol ester lube, then the trans fluid could absorb a whole lot more atmospheric moisture than a regular mineral oil based transmission fluid.

    So keeping temps really low like below 190 for long periods could over time create a moisture issue unless the fluid is changed.
     
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  12. Aug 12, 2020 at 5:51 AM
    #162
    sgtfluffy16

    sgtfluffy16 [OP] New Member

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    Great information for sure. I came from a Tacoma. I had an 07 TRD sport. Because that was out of warranty when I first bought the truck at 68000 Miles about 10 years ago I put red line fluids in the differential, transfer case, and transmission. That's probably what I will do to the tundra when I install a transmission cooler. But for warranty purposes at the moment I'm leaving the WS in
     
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  13. Aug 12, 2020 at 5:53 AM
    #163
    Ruggybuggy

    Ruggybuggy Seasoned Veteran

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    WS fluid has been running in this transmission for the last eleven years at around 190F and hasn't had a problem with moisture.
     
  14. Aug 12, 2020 at 5:57 AM
    #164
    sgtfluffy16

    sgtfluffy16 [OP] New Member

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    A customer concern settlement is what I am looking for. Especially with the data that I have backed up. With only more Rock Solid data coming in. As you stated, I do plan to add a cooler to my Tundra. But is it also true that you should never mount a transmission cooler with the inlet and Outlet lines facing down? On top of that, is there an inlet and outlet flow on the "warmer" ? I feel like that is very imperative to when installing a cooler as well
     
  15. Aug 12, 2020 at 5:58 AM
    #165
    blanchard7684

    blanchard7684 New Member

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    190 and above yeah is likely ok. When driving or towing there is likely a good amount of time for fluid to reach 200-212 F and release absorbed moisture.
     
  16. Aug 12, 2020 at 5:59 AM
    #166
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    Yes, inlet and outlet should NOT be on the bottom. Outlet must be on the top of the exchanger.

    Flow direction through exchanger can be specific, but it is unlikely for a simple transmission cooler. Follow manufacturers directions if any. If the flow direction is important, the connections will stamped "inlet" and "outlet".

    Edit: To retrofit an external cooler, you'll have to add the thermostat.

    dananderstein2.jpg
     
    Last edited: Aug 12, 2020
  17. Aug 12, 2020 at 6:00 AM
    #167
    2a_TX_Tundra

    2a_TX_Tundra New Member

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    How to Monitor Temps: Cheapest option is to buy the app "OBD Fusion" on your phone and input the custom PIDs for the pan and torque converter temperatures (see below). You will also need the bluetooth OBD adapter. There are many brands but here is one of the cheaper options.
    [​IMG]
    [​IMG]


    $33 Veepeak OBDCheck BLE OBD2 Bluetooth Scanner Auto OBD II Diagnostic Scan Tool for iOS & Android, Bluetooth 4.0 Car Check Engine Light Code Reader Supports Torque, OBD Fusion app
    https://www.amazon.com/Veepeak-OBDCheck-Bluetooth-Diagnostic-Supports/dp/B073XKQQQW


    In order to input the pan and torque converter custom PIDs on your OBDFusion app go to "settings" then "User-Defined PIDs". Copy the information below. Leave everything the same besides what I am telling you to change.

    ATF Pan
    Name: ATF Pan
    Description: ATF Pan
    English Units: F
    Min Value: 0
    Max Value: 300
    OBD Mode: 21
    PID Number: 82
    Equation: ((((A*256)+B)*(7/100)-400)/10)

    Torque Converter
    Name: Torque Converter
    Description: Torque Converter
    English Units: F
    Min Value: 0
    Max Value: 300
    OBD Mode: 21
    PID Number: 82
    Equation: ((((C*256)+D)*(7/100)-400)/10)
     
  18. Aug 12, 2020 at 6:00 AM
    #168
    TemujinNomad

    TemujinNomad New Member

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    No issues so far. 5,000 miles on it. Was going through the mountains last night. Outside temps were 50F. Average temps = Coolant -170, trans- 170. Running smooth. No CELS.
     
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  19. Aug 12, 2020 at 6:05 AM
    #169
    ColoradoTJ

    ColoradoTJ Certified tow LEO Staff Member

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    Exhaust gas temperatures on a gasoline motor are higher, that's for sure. The cooling systems operate in the same manner though, would you not agree? Let's not focus on the "diesel" part, but the "cooling" part and what I was suggesting.

    Since Toyota uses engine coolant to warm/cool the transmission, maybe we can use this to our advantage? Ford HD trucks use engine coolant in the same way. Most of my friends have Ford F250/350 trucks ranging from 65,000 to 210,000 miles of pretty hard use. I asked, and they see temps of 240* pretty regularly. None of them have had transmission problems other than scheduled service.

    In one of my other posts in here, some options:

    -Heat wrap/heat shield by transmission

    -Lower coolant temp. Maybe play with one of these:

    https://www.mishimoto.com/toyota-tu...nkC4GJld6lbnrXSdFQEPQvxy_fi5Gq7hoCkeYQAvD_BwE

    Call Stant. They might have a 170* thermostat that would work for your application?

    https://partcat.com/stant

    Maybe URD can help? They would do a 170* thermostat in the SC 4.7L application since the 160* was not optimal.

    https://www.urdusa.com/170-degree-performance-thermostat-for-2uz-fe-4-7l-v8/


    Do I think you have a legitimate concern? Honestly...yes I do, but I also would not lose one bit of sleep over it. For me, I would install one of these "kits" that members have put together and be happy.
     
  20. Aug 12, 2020 at 6:05 AM
    #170
    2a_TX_Tundra

    2a_TX_Tundra New Member

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    On the phone with Toyota now. Gonna see what they wanna do about this.
     
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  21. Aug 12, 2020 at 6:16 AM
    #171
    2a_TX_Tundra

    2a_TX_Tundra New Member

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    Just got off the phone with Toyota, they stated this needs to be taken up with the dealer and they will have the dealer rep call me to discuss.
     
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  22. Aug 12, 2020 at 6:35 AM
    #172
    Cpl_Punishment

    Cpl_Punishment Young men never die.

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    And if Exxon told you that their fluid decomposes at, say 280 degF, next week Shell will be advertising that their fluid decomposes at 290 and steal a bunch of Exxon's customers.

    Just because they WON'T tell you something doesn't mean they CAN'T.
     
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  23. Aug 12, 2020 at 6:38 AM
    #173
    hagrid

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  24. Aug 12, 2020 at 6:39 AM
    #174
    blanchard7684

    blanchard7684 New Member

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    Mobil site seems to be down lol...I think we broke it.
     
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  25. Aug 12, 2020 at 6:55 AM
    #175
    Cpl_Punishment

    Cpl_Punishment Young men never die.

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    How were you able to find this info when the OP wasn't?
     
  26. Aug 12, 2020 at 6:56 AM
    #176
    2a_TX_Tundra

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    someone was able to locate it in the TIS system. The transmission fluid max temp is 221 degrees.
     
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  27. Aug 12, 2020 at 7:14 AM
    #177
    Ruggybuggy

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    2018 and older Tundras have a running temp of around 180 to 185 not towing.
     
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  28. Aug 12, 2020 at 7:18 AM
    #178
    2a_TX_Tundra

    2a_TX_Tundra New Member

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    My 2020 is running 225 to 235 not towing.
     
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  29. Aug 12, 2020 at 7:21 AM
    #179
    Dragracer_Art

    Dragracer_Art New Member

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    It gets plenty hot down here in GA... so I just ordered a 160 degree T-stat. :thumbsup:

    I will be adding the transmission cooler also (waiting on parts to arrive)... so hopefully things will stay nice and cool over the long term.
     
  30. Aug 12, 2020 at 7:24 AM
    #180
    Ruggybuggy

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    It's not in the TIS system and have no idea why the 221F keeps coming up. The OP said he was contacted by Toyota through TIS. I asked him how that was possible and he then said a customer rep told him it was in TIS and mentioned the 221f spec. There is nothing published by Toyota in TIS that mentions specifications of WS fluid.
     
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