1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

Need a method of measuring Transmission Temp

Discussion in '3rd Gen. Tacomas (2016+)' started by wiffleball, Mar 20, 2017.

  1. Mar 20, 2017 at 12:54 PM
    #1
    wiffleball

    wiffleball [OP] New Member

    Joined:
    Mar 20, 2017
    Member:
    #213843
    Messages:
    1
    I looked at apps like DashCommand, but unfortunately they are not able to read enhanced data through the OBD2 yet for 2016 Toyotas. Any other ideas?
     
  2. Mar 20, 2017 at 1:31 PM
    #2
    kahanabob

    kahanabob Well-Known Member

    Joined:
    Feb 19, 2011
    Member:
    #51477
    Messages:
    1,177
    Gender:
    Male
    Maui
    Vehicle:
    16 TRD 2WD 4DR
  3. Mar 20, 2017 at 1:31 PM
    #3
    gearcruncher

    gearcruncher Well-Known Member

    Joined:
    Nov 1, 2012
    Member:
    #90305
    Messages:
    5,003
    Gender:
    Male
    First Name:
    Canadain bumper technician
    Great white North 51.0333° N, 93.8333° W
    Vehicle:
    2010.TRD.SportDCLB4x4Limited leather package
    TRD Sport Rally -5 speed automatic Limited ,Factory heated leather seats ,chrome package,Super white with front windows tinted to 35 % Dick Cepek DC-2 wheels Summer tires - Good year silent armor P265/65R17 Winter tires - Good year P265/65R17 Ultra Ice studded Illuminated 4x4 switch TRD 3rd brake light cover ($20) TRD seat belt shoulder protectors (5). ($50) TRD ...B pillar emblems ($20) TRD rear slider sticker with devil horns ( $6) TRD summer floor matts ($60) TRD steering wheel emblem ($20) TRD floor pedals .($95) TRD shorty antenna ($14) TRD front Windshield emblems ($17) TRD head pillows .($60) TRD head rest protectors TRD door scuff protection $20 TRD floor matt emblems ($40) TRD tow plug emblem . ($40) TRD cigarette lighter with LED.($35) TRD tissue dispenser ($12) TRD front bezel emblems ($9) TRD door emblems ($6) TRD lanyards($9) TRD lisence plates with TRD bolts($50) TRD fender emblems TRD center caps Part Number:PT904-35070-CC ($80) TRD cd
    Lets have a peek at what transmission coolers do
    TRANSMISSION COOLERS
    If you do not have a transmission cooler on your truck and you plan to tow or haul heavy loads or you are in heavy stop and go traffic and use 4X4 low a lot , consider purchasing a cooler . The cooler thats built into your rad is designed to cool the transmission with the weight of just the truck by itself .When you are in 4x4 low , your torque converter is usually in the stall stage and creates a tonne of additional heat .You dont have much air flow going through your rad when you are in low range 4x4 .
    160 - 200 are considered normal temps providing your engine radiator is functioning properly . If your engine overheats , your transmission will also overheat
    Normal fluid temperature in transmission to be 175 deg. F.

    Rate of oxidation to double for each temperature increase of 20 deg F above normal (175 deg F). As oxidation rate doubles, useful life of fluid is cut in half.

    At 175 deg F life is 100,000 miles
    At 195 deg F (20 deg above 175) life is 50k miles
    At 215 life is 25k miles
    At 235 life is 12k
    At 255 life is 6,250
    At 275 life is 3,000
    At 295 life is 1500
    At 315 life is 750

    At temperatures much above 300 deg F the metals in the transmission will tend to warp, twist etc. high temperatures causes the formation of varnish deposits which impair or pre vent transmission operation.

    At a fluid temperature of 415 deg F fluid life is 30 minutes!

    Source: Empire Lubricants Inc.
    Consider a scan guage [​IMG][​IMG][​IMG]http://www.amazon.com/ScanGauge-Comp.../dp/B000AAMY86
    Here is the best information for the scan guage http://www.tacomaworld.com/forum/2nd...-pressure.html

    Ultraguage is now offering transmission temps http://www.tacomaworld.com/forum/2nd-gen-tacomas/318340-ultragauge-transmission-temp.html

    You could also use the Torque app with an Android phone as a cheap alternative to watch your temps http://www.tacomaworld.com/forum/per...d2-reader.html

    This is how Low Pressure Drop technology works::
    When Automatic Transmission Fluid (ATF) is cold it is viscous. The unique Tru-Cool design allows the colder, thicker ATF to flow more efficiently through two open bypass channels positioned at the top of the cooler. As operating temperatures increase, the ATF becomes hotter and thinner, It's then directed through the core where it is cooled. Tru-Cool's highly efficient cooling technology combines improved protection against lube failure with optimal heat transfer.
    [​IMG][​IMG][​IMG]http://www.amazon.com/Long-Tru-Cool-.../dp/B005XZXB1M
    Long Tru-Cool Oil Coolers offer advanced cooling protection for many towing applications. The advanced technology out performs TUBE & FIN Designs, Delivers up to 15 times less flow restrictions, 30% more cooling delivers maximum heat transfer, Self-Regulating for maximum lube flow protection through start-up, varied temperatures and driving conditions, heavy loads and towing.
    Here is Toyotas fluid flow guide ...Look at page 8 on this PDF http://www.toyotatundraforum.com/pdf/A750E.pdf
    And here is a guy who recently installed a cooler correctly http://www.tacomaworld.com/forum/1st...agram-pic.html

    cooler and fan install http://www.tacomaworld.com/forum/2nd...n-install.html

    HERE is the Tacoma World Towing Bible https://www.tacomaworld.com/threads/the-tacoma-towing-bible.4031/
     
    t0nyvalenzuela, vicali, bigmw and 4 others like this.
  4. Mar 20, 2017 at 8:34 PM
    #4
    Taco351

    Taco351 Well-Known Member

    Joined:
    Oct 15, 2016
    Member:
    #199858
    Messages:
    349
    Gender:
    Male
    First Name:
    Robert
    NLR/Sherwood
    Vehicle:
    2017 Tacoma Double Cab 4X4 TRD Off-Road White
    K&N air filter/LED lights/Magna Flow Muffler/TOYO AT2 Tires and lots of fun stuff.
    I bought a Scan Gauge II a few months ago because I wanted to monitor the transmission oil temp while towing. This gauge read the pan temp and converter temp. I am very concerned because average driving on the highway in 50 degree weather the tranny is running 190 at the pan and 190-195 at the converter. I have the factory tow package. This seems hit to me to not be towing. I'm going to check my tranny fluid myself even though Toyota said they checked and I have no documentation that they did. I'm wondering if the fluid could be low. Has anyone else used the scan gauge and what readings are you getting?
     
  5. Mar 20, 2017 at 9:03 PM
    #5
    smitty99

    smitty99 I also bought a 4Runner

    Joined:
    Sep 10, 2015
    Member:
    #163923
    Messages:
    13,005
    Gender:
    Male
    Scottsdale
    Vehicle:
    16 TRDORDCSB 4x4 A/T (loaded w/ JBL)
    6112s/5160s & 3-leaf AAL;ubolt flip kit;Superbumps
    :bowdown:
     
  6. Mar 20, 2017 at 10:27 PM
    #6
    Lord Humongous

    Lord Humongous The Ayatolah Of RockNRolla

    Joined:
    Jan 14, 2016
    Member:
    #174960
    Messages:
    2,103
    Gender:
    Male
    AZ
    Vehicle:
    Inferno 3rd gen trd offroad 4x4
    https://www.tacomaworld.com/threads/lord-humongous-gigahorse-build.436524/
    These are the exact same readings I have been getting with my scan gauge. My exterior thermometer was reading 94f in Phoenix today and I was running 190-195 trans temps. I've been noticing when it's cooler outside or at night it runs a bit cooler at about 185-190. I actually just installed a 11x11 cooler with a 10" 950 cfm fan this evening. I'm gonna plumb the lines and top off the fluid in the AM once the fluid is cool. I plan on running it in tandem with the OEM setup. I do quit a bit for towing so hoping I get some improvement!! Sorry for the crappy pic. I'll get some better ones once I finish.

    BTW the dash engine temp game has never budged from the middle nornal range regardless of towing or easy highway driving.

    20170320_161555.jpg
     
  7. Mar 20, 2017 at 10:29 PM
    #7
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    Do the third gens have a transmission heat exchanger and thermostat? Those temps are pretty much in line with coolant temps.
     
  8. Mar 20, 2017 at 10:30 PM
    #8
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    If they do, you can probably pin the thermostat open and get lower temps like the tundras.
     
  9. Mar 20, 2017 at 10:34 PM
    #9
    Lord Humongous

    Lord Humongous The Ayatolah Of RockNRolla

    Joined:
    Jan 14, 2016
    Member:
    #174960
    Messages:
    2,103
    Gender:
    Male
    AZ
    Vehicle:
    Inferno 3rd gen trd offroad 4x4
    https://www.tacomaworld.com/threads/lord-humongous-gigahorse-build.436524/
    Yes they do. Pretty much the same setup as the second gens. I thought I was getting water temps at first but there is a noticeable difference in readings when the truck is cold i.e. the engine warms up much faster than the trans.

    There is definatly a thermostat on the oil sending unit. I plan on pinning it open when I add fluid tomorrow morning.

    The above info is great to have!!! Considering the temps im running I'm definatley having the tranny serviced at 50k!
     
  10. Mar 20, 2017 at 10:50 PM
    #10
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    I'm not taking about the exchanger in the radiator, I'm taking a stand alone warmer with coolant hoses running to it, basically a heater core for your transmission. My second gen rarely gets above 150°, I saw the tc outlet at 200° once towing hard at low speeds, that's the hottest I've seen mine.
     
  11. Mar 20, 2017 at 10:55 PM
    #11
    Lord Humongous

    Lord Humongous The Ayatolah Of RockNRolla

    Joined:
    Jan 14, 2016
    Member:
    #174960
    Messages:
    2,103
    Gender:
    Male
    AZ
    Vehicle:
    Inferno 3rd gen trd offroad 4x4
    https://www.tacomaworld.com/threads/lord-humongous-gigahorse-build.436524/
    Yah it's this dinky thing on the drivers side, it passes through the radiator first. 20170316_181813.jpg
    This is thermostat on the sending unit for anybody whos interested.20170308_163744.jpg
     
    Rick's 2012 and gearcruncher like this.
  12. Mar 20, 2017 at 11:09 PM
    #12
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    There you go. That's the heat exchanger. You could just disconnect and couple the heat exchanger hoses together and bypass the thing all together. If you do that and pin the thermostat open you'd probably be running around 150°. It might trigger a CEL though. The second gens cooling loop just runs through the radiator then to the cooler in front of the condenser(if you have the towing package) and back to the pan. My tranny almost never gets over 100° in the winter. I've actually considered adding a thermostat, maybe even a heat exchanger, to help it warm up. Hotter trans temps (within reason) will help boost mpgs. The hotter temps do degrade the atf faster though.
     
  13. Mar 20, 2017 at 11:12 PM
    #13
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    That heat exchanger is what's heating your fluid up, no amount of extra coolers are gonna cool your fluid down unless you:
    A: pin the thermostat open, or
    B: disable the heat exchanger
    Even with the heat exchanger bypassed the fluid will still get up to the thermostat opening temp, it will just take longer.

    Edit: @Lord Humongous I love your truck and winch/bumper setup. I want an inferno orange so bad, maybe one day. Lol
     
  14. Mar 20, 2017 at 11:29 PM
    #14
    Lord Humongous

    Lord Humongous The Ayatolah Of RockNRolla

    Joined:
    Jan 14, 2016
    Member:
    #174960
    Messages:
    2,103
    Gender:
    Male
    AZ
    Vehicle:
    Inferno 3rd gen trd offroad 4x4
    https://www.tacomaworld.com/threads/lord-humongous-gigahorse-build.436524/
    Thanks!! I haven't had any temp problems yet but just want the cooler on there for the sake of overkill. I was thinking about bypassing and running a remote cooler to the bed or something but I'm gonna leave the oem stuff until the warranty is up. If I have a catastrophe failure it'll be easy to remove the aftermarket cooler and send it to the dealer for work:spy:
     
    07 sport 4x4 likes this.
  15. Mar 20, 2017 at 11:35 PM
    #15
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    You'll be fine, just change the fluid at 50-60k. 200° isn't hurting anything. I'd be curious to see what the temps were towing at full capacity on a hot day on a steep hill or through mountains, basically a worst case scenario. Since you have a thermostat, you can add all the coolers you want and not make any significant difference in temp, with the exception of an extreme event, such as towing in the manner I described above.
    IMG_4049.jpg
     
    Lord Humongous likes this.
  16. Mar 20, 2017 at 11:40 PM
    #16
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    Don't know if you're aware, but a pull fan is much more effective than a push fan. I forget what the numbers were on efficiency, but it's pretty significant. I think I was reading about it on a jeep forum one time. :spy:
     
    Lord Humongous likes this.
  17. Mar 21, 2017 at 12:10 AM
    #17
    Tharris242

    Tharris242 Technically

    Joined:
    Jul 30, 2015
    Member:
    #160687
    Messages:
    426
    Gender:
    Male
    Houston, TX
    Vehicle:
    2017 TRDOR DCSB 4X4 A/T FP TO BL
    Solid Fold 2.0, Air Dam
    Under the SAE J2807 standard, the vehicle (at max tow) must go up AZ SR68 (or eq) ~3000 ft over ~11.4 miles at a minimum of 100F ambient temp with AC on full never dropping below 40mph without any warnings/CEL.

    Anyone know what temp gives a ATF warning?
     
  18. Mar 21, 2017 at 12:19 AM
    #18
    07 sport 4x4

    07 sport 4x4 Well-Known Member

    Joined:
    Dec 24, 2010
    Member:
    #48165
    Messages:
    1,342
    Gender:
    Male
    First Name:
    Blake
    Southeast
    Vehicle:
    2017 Duramax
    2nd gen is at 302°F I believe
     
  19. Mar 21, 2017 at 3:49 AM
    #19
    MSCOFF

    MSCOFF Well-Known Member

    Joined:
    Feb 27, 2011
    Member:
    #51928
    Messages:
    172
    Gender:
    Male
    First Name:
    Mark
    CT
    Vehicle:
    2017 SR5 AC 4WD
    my 2017 AC runs around 190 also. haven't tried towing yet. I had a 2015 which ran about 160.
     
    Lord Humongous likes this.
  20. Mar 21, 2017 at 5:42 AM
    #20
    Taco351

    Taco351 Well-Known Member

    Joined:
    Oct 15, 2016
    Member:
    #199858
    Messages:
    349
    Gender:
    Male
    First Name:
    Robert
    NLR/Sherwood
    Vehicle:
    2017 Tacoma Double Cab 4X4 TRD Off-Road White
    K&N air filter/LED lights/Magna Flow Muffler/TOYO AT2 Tires and lots of fun stuff.
    Did you come out of the stock tranny cooler and run into your 11x11 and then back to the tranny?
     

Products Discussed in

To Top