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Get my transmission temp down

Discussion in '1st Gen. Tacomas (1995-2004)' started by Black Hills Tony, Jul 30, 2017.

  1. Jul 30, 2017 at 2:40 PM
    #1
    Black Hills Tony

    Black Hills Tony [OP] Active Member

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    Attached image is the transmission and coolant temps after driving up hill to my house. It's about a 3 mile pull with about 800' of elevation gain. Going about 25 mph. Ambient temperature is about 89 degrees. Not carrying any cargo.

    I just started monitoring transmission temp. I had no idea it was getting this hot.

    I've got the non-tow package fan clutch (orange).

    Should I upgrade to the fan clutch to the tow package (green) version? Should I add an oil cooler? Both?

    Thanks in advance.Screenshot_20170730-140115.jpg
     
  2. Jul 30, 2017 at 4:38 PM
    #2
    RLD831

    RLD831 Active Member

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    I added a transmission cooler to my truck and completely bypassed the cooler in the radiator. I also use Torque to check my temperatures and mine never goes over 175. I live in South Florida, so I do use it in super hot conditions.
     
  3. Jul 30, 2017 at 5:09 PM
    #3
    4x4runner2002

    4x4runner2002 Well-Known Member

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    Turn o/d off to lock the torque converter when going up long hills and it will keep your trans temp way down.
     
    Black Hills Tony [OP] likes this.
  4. Jul 30, 2017 at 5:13 PM
    #4
    Black Hills Tony

    Black Hills Tony [OP] Active Member

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    Which cooler did you go with?
     
  5. Jul 30, 2017 at 5:14 PM
    #5
    Black Hills Tony

    Black Hills Tony [OP] Active Member

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    I'll try that. Figured I didn't need to do that unless I was loaded or pulling a trailer.
     
  6. Jul 30, 2017 at 5:18 PM
    #6
    4x4runner2002

    4x4runner2002 Well-Known Member

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    I mean it's not necessary as you have prob made it up that hill many times but it'll be easier on the tranny temp. It'll lock you in third gear so you'll have higher revs but not by much.

    Also you said you were only going 25mph so your torque converter wasn't locked. Should lock around 38-40 mph and that would keep the temp down as well, as long as it's staying in 4th and not constantly shifting.

    I also run a external tranny cooler but I run it in series with the factory cooler.
     
  7. Jul 30, 2017 at 5:39 PM
    #7
    Black Hills Tony

    Black Hills Tony [OP] Active Member

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    Yep. I've been driving up this hill in this Tacoma since 2010. I want to keep doing it for as long as possible. Hitting 220 degrees on a daily basis is not ideal.

    I didn't realize that was happening until I got this little obd2 Bluetooth adapter gizmo.

    Which is more bang for the buck, oil cooler or heavy duty fan clutch?
     
  8. Jul 30, 2017 at 6:07 PM
    #8
    KdF

    KdF Old Rednek Type

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  9. Jul 30, 2017 at 6:13 PM
    #9
    PapaBear

    PapaBear Never test how deep the water is with both feet.

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    I understand you're a first gen having a cooling problem but maybe I can give my 2 cents too. Since you aren't towing I would suggest just a simple trans cooler plumed with the internal radiator portion. That should lower temps. If you were or are towing something with a lot of strain, I would suggest a stacked plate cooler and upgrading to flex lite electric fans instead of the clutch fans.
     
  10. Jul 30, 2017 at 6:28 PM
    #10
    Black Hills Tony

    Black Hills Tony [OP] Active Member

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    Thanks Papa Bear. I thought straight electric fans were good for highway use and helped improve fuel economy, but struggled at slow speed stuff, especially under load. I use my Tacoma for hauling firewood (see profile pic), and a fair amount of other back country stuff in steep terrain.

    A transmission cooler like the one kdf suggested seems like cheap insurance.
     
    PapaBear likes this.
  11. Jul 30, 2017 at 6:34 PM
    #11
    127.0.0.1

    127.0.0.1 AKA ::1

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    turn off the temp monitor

    problem solved

    srsly, there is nothing wrong here

    but tranny cooler is easier/cheapest way to drop temp
     
    cruxofthebisquit likes this.
  12. Jul 30, 2017 at 6:57 PM
    #12
    Black Hills Tony

    Black Hills Tony [OP] Active Member

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    /Thread :cool:
     
  13. Jul 31, 2017 at 4:08 PM
    #13
    austinsdad99

    austinsdad99 Well-Known Member

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    Do all the 1st gens have the AT Oil Temp light? Mine has the place on the dash but i noticed it does not light up with all the other lights when key is on... Ive heard it dont come on until the temp is ungodly high anyway.. not sure if that is true or not.
     
  14. Jul 31, 2017 at 5:46 PM
    #14
    127.0.0.1

    127.0.0.1 AKA ::1

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    it comes on
    and yours is malfunctioning
     
    austinsdad99 likes this.
  15. Jul 31, 2017 at 5:50 PM
    #15
    cruxofthebisquit

    cruxofthebisquit Well-Known Member

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    OME and worth every penny.
    every auto. trans. benefits from a better cooler. I'd even put one on a Camry.
     

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