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A-TRAC/TRAC/AUTO LSD Explained (Easy to understand, I hope!)

Discussion in 'Technical Chat' started by David K, Jan 19, 2010.

  1. Oct 20, 2016 at 5:23 PM
    #1321
    surforegon

    surforegon Well-Known Member

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  2. Oct 20, 2016 at 5:48 PM
    #1322
    old55guy

    old55guy Well-Known Member

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    so ? do you guys have a way to undo ( bypass ) the ABS ??? Also I want a small laminate print out of that chart ??? How to use my 4x4 , any interest ? Big thank you for all this Info !!!!
     
  3. Oct 20, 2016 at 8:23 PM
    #1323
    David K

    David K [OP] Well-Known Member

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    ABS is your friend in the A-TRAC system, so a bypass would be the opposite of the purpose of thread.
     
  4. Oct 21, 2016 at 10:58 AM
    #1324
    ejl923

    ejl923 Well-Known Member

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    i was thinking about this yesterday, looking at that little used button down on the left. Does anyone actually use the auto LSD? why would you want to?
     
  5. Oct 21, 2016 at 1:24 PM
    #1325
    jsucraig

    jsucraig Well-Known Member

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    Mudflaps removed, LED Interior lights, 886 Fog Lamps for Reverse Halogens, Redline Tuning Hood Struts, Garmin Dashcam 20, 17X8 Chrome Helo HE791 MAXX Wheels, Cooper Discoverer AT3 265/65R17, Memphis Car Audio Speakers and Amps, mattgecko LED Bed Light kit, Truxedo Low Pro QT Tonneau Cover, OEM Bed Mat
    I used mine in the rain when my tires started to get worn to the point that they had not very good wet traction. That lasted about 40,000 miles.
     
  6. Oct 23, 2016 at 9:33 AM
    #1326
    bnv

    bnv Boy I say, use CRAWL to sneak up on that dawg!

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    Is it true that MTS/A-TRAC is cancelled at speeds over 7 mph. I saw that in the 4 Runner forum.

    Can any verify this.
     
  7. Oct 23, 2016 at 11:43 AM
    #1327
    David K

    David K [OP] Well-Known Member

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    NO... the only canceling is if you use the Locking Rear Differential... and once you are moving from a stuck, the A-TRAC system is not needed... so no breaking on a front tire if you are moving over 3 mph, only if you get bogged down will traction control be needed.

    Do not use the locker except if you get stuck and A-TRAC (MTS/Crawl) does not keep you moving... and I have yet to find a place that happens.
     
  8. Oct 23, 2016 at 11:46 AM
    #1328
    David K

    David K [OP] Well-Known Member

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    This really has been discussed hundreds of times since 2009...
    AUTO LSD is the traction control (limited slip) option that does NOT cut engine power in 2WD.
    In 4WD-HI, it is called TRAC OFF... same process, however.

    If you don't press the button and keep it in TRAC then the system cuts the power and can apply breaks to stop tire spin.
     
    02Duck likes this.
  9. Feb 16, 2017 at 6:31 PM
    #1329
    DeX4x4

    DeX4x4 Member

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    So my question is.. which 4x4 settings do I use to pull my buddy's Chevy Colorado out when he gets stuck?
     
  10. Feb 16, 2017 at 8:24 PM
    #1330
    David K

    David K [OP] Well-Known Member

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    A-TRAC and the Rear Locked for pulling, no engine cut as with A-TRAC alone (reduces wheel spin ).
    I have pulled more than one truck up a steep hill that way. Click the video in my sig to see one.

    https://www.youtube.com/watch?v=9m1u1pba4Ps
     
    Last edited: Feb 17, 2017
    old55guy and DeX4x4 like this.
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