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AUTO LSD (or Not) for added traction in 2WD?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by David K, Oct 19, 2010.

  1. Jun 21, 2013 at 12:16 AM
    #121
    DoorDing

    DoorDing Intentionally obtuse

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    yes
  2. Jun 21, 2013 at 12:26 AM
    #122
    SuazoYota

    SuazoYota Well-Known Member

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    yea i read that one about a month or 2 after i got stuck! dummy me probably will do it again and get stuck again tho:eek:
     
  3. Jun 22, 2013 at 9:20 AM
    #123
    David K

    David K [OP] Well-Known Member

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    Good post Spencer! Thank you!!
     
  4. Feb 15, 2014 at 8:31 AM
    #124
    RedHusky

    RedHusky Procedural Deviant

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    Yes. Here in VA just got what for us is a bunch of snow, 8+". 13 PreRunner TRD Sport. Was following a friend (in an FJ 4x4) on unplowed streets covered with a few inches, fishtailing a bit on level road, then headed up a hill. Halfway up the rear came around a bit on me and I lost all momentum. Couldn't get going, turned on ALSD (first time ever), and then it dug for a second and got traction. Motored right up the hill.
     
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  5. Feb 15, 2014 at 9:07 AM
    #125
    Marcoc

    Marcoc Well-Known Member

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    I tried Auto-LSD the other day in deep snow here in CT after a large snow storm. I jammed the truck into a snow bank in front of my house. I was in 2wd, swithed VSC off, and Auto-LSD on to see what it would do in 2wd. Well to my amazment with the added aid of my Duratracs the truck spun its way out pretty easily. I will be using this more often when hauling my snow blower to the parents house in slushy conditions, under 30mph, and in 2wd. Learning what Toyotas traction aids do is interesting. Too bad so many poeple dont realize 4wd Toyotas (tacomas) have these choices.
     
  6. Feb 15, 2014 at 9:13 AM
    #126
    Marcoc

    Marcoc Well-Known Member

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    Out here in the NE when I do any trail driving that may get nasty that requires 4LO i make sure TRAC is active. It works so good in all conditions. I think I used my locker twice to get out of an extremly deep mud hole and to pull out a stuck full-size chevy truck from a snow bank with great success. Trac works awesome and so does the Auto-LSD in 2wd
     
  7. Feb 17, 2014 at 9:10 AM
    #127
    David K

    David K [OP] Well-Known Member

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    Just to clarify, for the others...

    When AUTO LSD is ON, the VSC goes OFF under 30 mph. They are not controlled separately.

    In L4, there is A-TRAC (Active Traction Control)... which is a whole level different than TRAC (or the 4 Lo Trac Mod for those without an Off Road TRD).

    TRAC and AUTO LSD is limited slip and A-TRAC is almost like lockers, but is automatic so steering is not affected.

    In 2012, TRAC in H4 comes in 2 levels: TRAC and TRAC OFF. TRAC OFF is like AUTO LSD, but on all 4 corners.
     
  8. Jul 6, 2014 at 11:11 AM
    #128
    jackbower6864

    jackbower6864 Member

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  9. Jul 9, 2014 at 5:45 PM
    #129
    David K

    David K [OP] Well-Known Member

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    You video does not work (removed by user?).

    Only 2005-2008 SPORT TRDs had a mechanical limited slip rear differential (requiring oil modifier). ALL Tacomas from 2009 + have open differentials as the limited slip is created by on board computer using spin sensors and the ABS brake system.
     
  10. Jul 9, 2014 at 7:21 PM
    #130
    jboudreaux1965

    jboudreaux1965 ragin cajun

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  11. Jul 10, 2014 at 4:15 PM
    #131
    David K

    David K [OP] Well-Known Member

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    I understand your fears... a round earth that wasn't the center of the universe was also hard to accept for many years! ;)
     
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  12. Jun 24, 2016 at 4:15 PM
    #132
    tpotnoc

    tpotnoc Well-Known Member

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    Great illustration
     
  13. Jun 24, 2016 at 4:27 PM
    #133
    tpotnoc

    tpotnoc Well-Known Member

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    Can someone explain in more detail how TRAC with an open diff improves traction in sand or snow? It's my understand that TRAC simply cuts engine power.
     
  14. Jun 24, 2016 at 7:53 PM
    #134
    David K

    David K [OP] Well-Known Member

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    No, it also brakes a non traction tire so power transfers to the traction tire. For even more traction on 2012+ Tacomas, press the button for TRAC OFF which turns off the the engine regulation, what you experienced.
     
  15. Jun 24, 2016 at 11:10 PM
    #135
    tpotnoc

    tpotnoc Well-Known Member

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    ALSD does the braking of a non traction tire, so I'm not sure why TRAC would also do that. I'm assuming it cuts engine power thus reducing power to the wheels to slow them. VSC would use the ABS system to pulsate braking in order to control a break-away tire.
     
  16. Jun 25, 2016 at 7:47 AM
    #136
    David K

    David K [OP] Well-Known Member

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    ALSD is TRAC, without engine regulation... or regulation OFF (TRAC OFF).
    Auto LSD is the 2WD traction system without engine regulation (also known as TRAC OFF).
    A quick push of the VSC button turns on AUTO LSD in 2WD; and TRAC OFF in 4WD (2012+). 2009-2011 4WD TRAC is already without regulation without any button pushing.
     
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