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4low-trac

Discussion in 'Technical Chat' started by Isthatahemi, Sep 12, 2009.

  1. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    TRY AT YOUR OWN RISK. - SHARING THIS TO HELP OTHERS......
    If you locate pin 25, which is one of the 2 yellow wires with black tracer, on the top, white wiring harness that plugs in behind the glove box. You can remove the wire from the harness, (so that you can put it back later if you really want to get stuck...) This interupts the signal going to the TRAC module. The TRAC system then operates in 4L. There is no throttle intervention, and it is the best limited slip effect that I have ever experienced. (this is my 5th truck..) The guy who did all the testing found it to perform as well as ATRAC, it is likely the same thing.
    This is not my invention, a guy on another Tacoma site tried and quite thoroughly tested this. I cannot guarantee that you won't screw up your truck, but it sure works.
     
  2. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    It is the very top yellow wire, it does make a difference! You will know it works if you switch to 4L, and the Traction control light DOES NOT turn on.
    This causes the 4L lamp to flash, even once the gears are fully meshed, because this is the signal wire.....
     
  3. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    This mod works on Canadian trucks. I have no info on U.S. trucks. FYI
     
  4. ForeRunner

    ForeRunner BBC. Bring Back Clarkson Thor

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    Alright, I've read all the other threads and posts and with that...


    This belongs in technical chat. Post pics of the mod you have done and post up schematics of the systems affected. This will help those that want to do it but are skeptical. At least with a electrical schematic from the Tacoma's FSM you can clearly show what you are doing why you are doing it and how it works. Pictures will illustrate where the connectors are and how they are positioned and where the wire is you are talking about. With any mod you do to your truck/car it definitely comes with a "Try at your own risk".

    Please lets not beat a dead horse on this.

    Thanks,
    TW Staff.
     
  5. akwagon

    akwagon Alaska Dude

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    Any update on this???
     
  6. Tacoyota

    Tacoyota senile member

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    4.56 gears, rear trutrac,DT header, 235/85r16 Duratracs, 2nd filter pulled, inter.wipers, Cruise control, Factory alum. whls/winter tires(2nd set), Afe pro Dry-S , Dumbo eared flaps cut down.
    day 1 , it'll take time for more input im sure. My 08 has no trac or a-trac unfortunately.
     
  7. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    I went out wheeling for about 4-5 hours this weekend. Obstacles that got me completely stopped and stuck before, I could get over. At one point I was completly stuck in a mudhole, 2nd gear, 4L, and the one front tire that had solid ground pulled me out! It IS NOT as effective as ATRAC, it functions as the 4H TRAC system does. I have 4 videos, they are terrible quality, they are also situations that I caused, with TRAC off, and dug myself in, the first on is contrived, as I dug myself in, 2 wheels airborne. The second, I just drove up an incline, no TRAC, until the truck ROLLED BACKWARDS.
    The system acts like a limited slip on both ends. ATRAC is closer to an electronic locker, much tighter, less revving. I was just learning this system, and was using 1st gear, it works, but 2nd @2000-2500 is the sweet spot. Again the vids are bad, sorry, but it's from a phone with the wife recording. There were about 20 real, previously not even close to climbable mud / sand obstacles, now doable. The crowd watching was very impressed. Personally this is the most satisfying mod I have ever done.
    Functionaly, it operates, and feels the same if I switch to 4H. TRAC light flashes.....
    *******Going to have to work on posting the vids, patience please...
     
  8. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    This mod also works on U.S. trucks, just found out from a T.T. member....
     
  9. Tacoyota

    Tacoyota senile member

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    4.56 gears, rear trutrac,DT header, 235/85r16 Duratracs, 2nd filter pulled, inter.wipers, Cruise control, Factory alum. whls/winter tires(2nd set), Afe pro Dry-S , Dumbo eared flaps cut down.
    I'm lurking for data lol. My 08 has none of the traction controls ,just ABS. I'm hoping some clever person comes up with an easy mod for adding traction control.
     
  10. cmack

    cmack Impeach Chris4x4!

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    Is this only for 2nd gens I take it then?
     
  11. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    Yes. Ones with TRAC.
     
  12. akwagon

    akwagon Alaska Dude

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    I am trying this today... On my 09...
     
  13. akwagon

    akwagon Alaska Dude

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    I am thinking if this mod works, would work well just to install a switch on the dash to turn this on or off...... Home made Atrac :D
     
  14. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    BFG AT's, Weathertechs, Hoppy's brake controller.
    The VSC is your off switch, returns everything to normal.....
     
  15. grammy

    grammy Well-Known Member

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    Been looking at this mod for a while now and tried it today. I cut the wire and wired in a switch so I could return it to normal if need be. It seems to work, although it is not atrac, more like TRAC to the front and rear while in 4wd. I think somehow it tells the system it is not in 4wd and the trac system (which is usually disabled in 4wd) is activated.

    After watching videos of ATRAC, this is not the same. You don't crawl along like ATRAC. When the wheels without traction start to spin, you give it some extra gas, and the brakes are applied to the spinning wheels and then you start to creep forward. It does let the spin, but i guess when they spin a certain speed, the trac cuts in and brakes those wheels. Will definitely get you out if stuck.

    Thanks Isitahemi.
     
  16. Isthatahemi

    Isthatahemi [OP] Well-Known Member

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    Definatly requires a little throttle to make it work......
     
  17. akwagon

    akwagon Alaska Dude

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    More updates? anyone else try?
     
  18. Soundwave

    Soundwave Well-Known Member

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    What is TRAC? I know what A-TRAC is...
     
  19. Soundwave

    Soundwave Well-Known Member

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    Don't all 2009 and newer 4x4 tacoma's have A-trac? And isnt supposed to work in 4 lo anyway? Or is it an option? I thought I had seen some TRD off road package tacoma's with the A-Trac button beside the 12 volt cig plugs. Like the FJ?
     
  20. EGtaco

    EGtaco Well-Known Member

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    my sports package with longbed has the VSC. I thought it automatically disengages when you go into 4lo
     
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