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Trans cooler fan

Discussion in '2nd Gen. Tacomas (2005-2015)' started by BaconPower, Oct 28, 2014.

  1. Oct 28, 2014 at 2:05 PM
    #1
    BaconPower

    BaconPower [OP] Well-Known Member

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    This summer I will be towing cross-country up and down mountains and keep reading that transmissions run hot when towing.
    My truck has the towing package which, on the cooling side, consists of this dollar-bill-sized transmission oil radiator:
    [​IMG]

    I'm thinking, a fan would increase its efficiency without significantly altering the vehicle.
    What's your opinion on this? Do you know of cooler fan that would fit?
     
  2. Oct 28, 2014 at 2:17 PM
    #2
    jessandjamie

    jessandjamie Well-Known Member

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    A fans really only going to help if your at a low speed for a long duration. Moving 30 mph or so a fan isn't going to accomplish anything. The best thing you can do for trans temps is to try and keep the torque convertor locked.
     
  3. Oct 28, 2014 at 2:21 PM
    #3
    gearcruncher

    gearcruncher Well-Known Member

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    Last edited: Oct 28, 2014
  4. Oct 28, 2014 at 2:25 PM
    #4
    Idaholandho

    Idaholandho The other white meat

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    I suspect if you stay within the towing specifications there will be no issue.
    I would suggest buying a Ultra Gauge and monitoring temps while towing prior to your trip if there is concern.
     
  5. Oct 28, 2014 at 2:37 PM
    #5
    BaconPower

    BaconPower [OP] Well-Known Member

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    How do you keep the torque converter locked?
     
  6. Oct 28, 2014 at 2:41 PM
    #6
    jessandjamie

    jessandjamie Well-Known Member

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    Let’s say you’re cruising along at 50 mph and in fifth gear. You want to accelerate a little or have to push the gas pedal slightly to maintain speed due to a hill. Ever notice the rpms will rise a couple hundred but the truck didn’t downshift? That’s the torque convertor unlocking and starting to slip, which causes the tranny fluid temp to skyrocket. The only way on our trucks to prevent that is to manually downshift a gear or two and hope that the convertor relocks. You can monitor it happening with a scanguage or ultraguage.
     
    Last edited: Oct 28, 2014
  7. Oct 28, 2014 at 2:49 PM
    #7
    gearcruncher

    gearcruncher Well-Known Member

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    Thats awesome !!! I am going to the ultraguage web site to buy one tonight . I knew they were working on transmission temps but had no clue that a new model has been released to superceed the MX version . Thanks for the great info:)

    For the OP , its probably a good idea " not " to tow in 5th gear .
     
  8. Oct 28, 2014 at 2:54 PM
    #8
    jessandjamie

    jessandjamie Well-Known Member

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    I should have worded that differently.
    "I'm assuming the ultraguage can monitor trans temps." Sorry if I threw out wrong info.
    I had a scanguage that read the temps in my 2008 Tundra (we pulled a travel trailer) and 2010 4Runner. My Tacoma is a manual.
     
  9. Oct 29, 2014 at 12:36 PM
    #9
    ATHiker

    ATHiker Well-Known Member

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    In the event of going with a larger after cooler, do you have to add transmission fluid to account for the larger capacity?
     
  10. Oct 29, 2014 at 12:38 PM
    #10
    Idaholandho

    Idaholandho The other white meat

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    Absolutely.
     
  11. Oct 29, 2014 at 1:08 PM
    #11
    nut

    nut she'll ride

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    What is normal operating temps for the tranny? I have the torque app with the custom PID's to monitor both temp gauges in the tranny, but don't know whats normal.
     
  12. Oct 29, 2014 at 1:16 PM
    #12
    nd4spdbh

    nd4spdbh Well-Known Member

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    normal cruising towing my boat ill sit at 170-180*F trans pan temp. Pulling it up the backside of the grapevine, at 75mph in 3rd just givin her in 110*F ambients, the trans leveled out at 205 for the short bit while going up the hill.

    Dont worry about the trans if you have the towing package, you will be fine even if your doing slow speed stuff when the main fan kicks in your trans temps will stay just fine.

    That stated if you find the trans hunting between 4th locked, 5th unlocked and 5th locked.... just put the truck in 4th and let the torque converter lock up and your trans will love you.
     
  13. Oct 29, 2014 at 3:23 PM
    #13
    savedone

    savedone Well-Known Member

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    It depends on how much you are towing, the speed you intend on running, and the outside temperature. If you are considering going to the expense of a fan I suggest that you put a larger cooler on the truck. Get one rated for what the max rated weight the truck can pull or even a little larger.
     
  14. Oct 29, 2014 at 5:09 PM
    #14
    smd3

    smd3 Well-Known Member

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    What are you towing, what does it weigh?
     

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