1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

2010 tacoma 4x4 SR5 Auto LSD??

Discussion in '2nd Gen. Tacomas (2005-2015)' started by toyo freak, Apr 17, 2010.

  1. Apr 17, 2010 at 2:38 PM
    #1
    toyo freak

    toyo freak [OP] Another Toyota Enthusiast

    Joined:
    Mar 7, 2010
    Member:
    #32745
    Messages:
    1,508
    Gender:
    Male
    First Name:
    David
    Mobile, Alabama
    Vehicle:
    2010 V6 D-Cab 4x4
    5100s at 2.5, Wheeler 3 leaf progressive AAL, Weathertech liners, yellow wire mod, toyota OEM bed mat, cup holder mod, afe pro dry s air filter, UWS low pro toolbox, Escort radar detector
    Wats the point of this. I don't have the trd package but I do have the Auto LSD and TRAC controll. I have read many post but cant figure out why Auto LSD doesn't work in 4HI. So in 2wd, press the TRAC off button and that engages Auto LSD but only in 2wd. I read the manual and it doesn't help. So whats the deal? Do i use the TRAC on Pavement or do I use Auto LSD??
     
  2. Apr 17, 2010 at 2:47 PM
    #2
    mgrande

    mgrande iKill

    Joined:
    Apr 11, 2009
    Member:
    #15830
    Messages:
    5,357
    Gender:
    Male
    Orlando
    Vehicle:
    2011 TRD off road
    Kings, AP 3" leaf pack, timbrens front and rear, TC UCA's, pro comp 7189's, baja ATZ's, CBI sliders and rear, relentless front, dynomax catback
    Just keep trac on, I'm pretty sure the LSD will still cut in if you have wheel spin. In 4hi you cant use the LSD but you have trac, which pretty much the same, it just requires you to reach a certain rpm with slippage before it engages.
     
  3. Apr 17, 2010 at 5:02 PM
    #3
    Crom

    Crom Outside...

    Joined:
    Jun 22, 2009
    Member:
    #18782
    Messages:
    8,330
    Gender:
    Male
    First Name:
    Nick
    San Diego, CA
    Vehicle:
    2009 4x4 DCSB Overland Build
    Millions
    It is not apparent when reading the owners manual but I can clarify the difference.

    While in 2WD the difference between Auto-LSD and TRAC is that when wheel spin occurs while TRAC is active, it can regulate/reduce throttle and arrest the spinning wheel which will transfer torque to the opposite wheel on the same axle.

    When wheel spin occurs occurs while Auto-LSD is active, throttle is NOT regulated, and it will arrest the spinning wheel and send torque to the opposite wheel on the same axle.

    Now here is the subtle twist that most people don't get. If your truck is in 4WD, TRAC will not regulate throttle when wheel slip occurs.

    Therefore you can say that while in 4WD and TRAC is active, it is similar but not as powerful as Auto-LSD on both front and rear axles simultaneously.

    Also, we have discussed this subject ad infinitum in other threads, some of which are very good discussions.

    Here is a link to a good thread about Auto-LSD. The last three pages has some good meat in it. Read it carefully if you're hungry :hungry: for more information.

    http://www.tacomaworld.com/forum/technical-chat/60011-auto-lsd-what-point-4.html#post1557004

    All the best,

    Crom
     
  4. Apr 17, 2010 at 10:19 PM
    #4
    mgrande

    mgrande iKill

    Joined:
    Apr 11, 2009
    Member:
    #15830
    Messages:
    5,357
    Gender:
    Male
    Orlando
    Vehicle:
    2011 TRD off road
    Kings, AP 3" leaf pack, timbrens front and rear, TC UCA's, pro comp 7189's, baja ATZ's, CBI sliders and rear, relentless front, dynomax catback
    ^ much better job explaining than I did! I remember those threads, a bit overwhelming at first.
     
  5. Apr 18, 2010 at 12:05 PM
    #5
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    9,928
    Gender:
    Male
    San Marcos, Alta California
    Vehicle:
    2010 4WD Off Road DC
    Differential Breather Mod Light Bar: 2 Hella 4000 HID, 1 Cibie Halogen. Bilstein 5100s Ride Rite Air Bags
    Spend some time doing a search on this and you will read pages! I came to Tacoma World to learn what the various drive modes did... plus using them off road helped a lot.

    There is a difference with the AUTO LSD you have and the one I have with the OFF ROAD TRD 4WD TACOMA... Because of the hydraulic brake booster for the A-TRAC, our AUTO LSD and TRAC are stronger...

    I would suggest you only turn on the AUTO LSD when you need 'posi-traction' in 2WD to move from a slippery location. You have LSD action with TRAC in 2WD, but like Crom said, the AUTO LSD doesn't regulate engine output and TRAC in 2WD does... so more power to the wheels. TRAC is for moving along (normal driving) and AUTO LSD is to start moving from a stop, if the wheels spin.

    TRAC in 4WD High Range is stronger like AUTO LSD because there isn't any engine regulation. Now, to have TRAC in Low Range 4WD, see the Yellow Wire Mod. posts!
     
  6. Apr 18, 2010 at 10:35 PM
    #6
    skistoy

    skistoy Make mine a Double!

    Joined:
    Jul 6, 2009
    Member:
    #19356
    Messages:
    2,006
    Gender:
    Male
    First Name:
    Mike
    Western New York
    Vehicle:
    09 4X4 SR5 BSP Double Taco
    Rear Spring TSB,Billy 5100@.85,Bull bar,Nerfbar,Painted Grill,Painted Rims,Bed D-rings,Compustar Starter,Goodyear Duratrac's,Transmission TSB,Brake Overide
    Get used to it :
    the truck is smarter than you
    and you are now it's servent - haha
     
To Top