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

Atrac and locking rear diff at same time?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by h50lholl, Dec 9, 2010.

  1. Dec 9, 2010 at 8:26 AM
    #1
    h50lholl

    h50lholl [OP] Member

    Joined:
    Dec 3, 2010
    Member:
    #47079
    Messages:
    15
    Gender:
    Male
    First Name:
    Bryant
    Alabama
    Vehicle:
    TRD Off Road Pyrite Mica
    Gonna buy a 2011 OR TRD tacoma soon I hope. Been reading up on all the diff traction contol systems. Can you use the Atrac and the lock rear diff at the same time?

    Thought I read some where that you can only under 3 mph.

    If not I would like to do the mod that will make Atrac avalible at the same time as rear locker.
     
  2. Dec 9, 2010 at 8:30 AM
    #2
    whitebread

    whitebread Well-Known Member

    Joined:
    Jan 11, 2009
    Member:
    #12489
    Messages:
    847
    Gender:
    Male
    First Name:
    Chris
    Raleigh, NC
    Vehicle:
    2011 4x4 DCSB TRD Off-Road
    Leer 100XL and a bunch of off-roading scars.
    You can use them at the same time, however when locked you can't exceed 5mph. The locker should only be used to get un-stuck.
     
  3. Dec 9, 2010 at 8:32 AM
    #3
    ink junky

    ink junky I phucking hate people >:(

    Joined:
    Jan 27, 2010
    Member:
    #30142
    Messages:
    5,056
    Gender:
    Male
    First Name:
    TACO LOVER
    TEXAS
    Vehicle:
    2010 4x4 trd off road DC,
    Aero turbine 2525, Snorkel, AFE pro dry drop in filter, BFG 33s, spydertraxwheel spacers :/. Debadged, rebadged black, TW sticker :D, bed lights, rod holders, OEM roof rack, Complete OME lift, bed lined fenders. Armor Tech Off road wrap around HC rear bumper w/ tire carrier swing out. Relentless front aluminum bumper. Le Devil Horns (_)
    A-trac comes on automatically on my truck when I switch to 4-low, you can use both a track and rear locker when in 4-low. :)

    Where's David, he'll school you :rolleyes:
     
  4. Dec 9, 2010 at 8:42 AM
    #4
    jonny

    jonny Betty White Edition Heep ZJ

    Joined:
    Jun 21, 2007
    Member:
    #1887
    Messages:
    8,375
    Gender:
    Male
    First Name:
    John
    oh boy
    another Atrac thread :rofl:
    but yes...they can be used at the same time :thumbsup:
     
  5. Dec 9, 2010 at 8:42 AM
    #5
    h50lholl

    h50lholl [OP] Member

    Joined:
    Dec 3, 2010
    Member:
    #47079
    Messages:
    15
    Gender:
    Male
    First Name:
    Bryant
    Alabama
    Vehicle:
    TRD Off Road Pyrite Mica
    The part about not exceeding 5 mph is what concerns me. That makes since in rock crawling type situations where slow is better but in mud it you often need to move a little faster. If you go over 5 mph with diff lock in 4low the atrac just shuts off automatically?
     
  6. Dec 9, 2010 at 8:59 AM
    #6
    senna

    senna Well-Known Member

    Joined:
    May 5, 2009
    Member:
    #16855
    Messages:
    391
    Gender:
    Male
    San Jose CA.
    Vehicle:
    09 DBL CAB TRD-OR OME shocks 885 and AAL
    It come on automatically because you leave the switch in the on position, and 4 lo activates it.
     
  7. Dec 9, 2010 at 9:12 AM
    #7
    supralight

    supralight Well-Known Member

    Joined:
    Aug 20, 2009
    Member:
    #21479
    Messages:
    674
    Gender:
    Male
    First Name:
    Dan
    Earth
    Vehicle:
    2013 4Runner limited
    DUDE didn't you read my post to you yesterday in another thread about the SAME subject????

    For the OP: just opened my manual page 182, which states:

    ''WHEN THE REAR DIFFERENTIAL IS LOCKED (VEHICLES WITH THE REAR DIFFERENTIAL LOCK SYSTEM)

    The active traction control system is activated only when the vehicle speed is less than 3MPH (6 KMH)''

    You can go as fast as you want with the diff locked. But A-TRAC will be active only under 3MPH.
     
  8. Dec 9, 2010 at 1:58 PM
    #8
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    9,936
    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
    I think the others, by printing what is in the manual (don't you have one?), have addressed this.

    But, to try and answer what you are asking or why you are asking... here's my way of helping:

    DON'T LOCK THE REAR DIFF. !

    USE THE A-TRAC, the A-TRAC will be with you always (Obi-Wan Kanobi voice).

    Otherwise: Use either the rear locker or the A-TRAC... As stated once you reach 3 mph while locked, the A-TRAC disengages.

    The rear locker will give you three drive wheels... both in back, and the one with the least traction in front... So, if one front tire is in mush or in the air... only your back tires will be driving you at that moment.

    The A-TRAC will give you drive with any traction tire or all 4 wheels that have traction. If both tires on the axle are in mush, then they will both turn the same... If one tire is in mush, then it will not spin away but instead will be matched to the traction tire.

    A-TRAC and the locker together don't provide more traction, but simply a bit less noise if the A-TRAC only comes on when you start to get stuck, then over 3 mph relies on the locked rear to continue.

    A-TRAC for über traction control!
     
  9. Dec 10, 2010 at 12:02 PM
    #9
    h50lholl

    h50lholl [OP] Member

    Joined:
    Dec 3, 2010
    Member:
    #47079
    Messages:
    15
    Gender:
    Male
    First Name:
    Bryant
    Alabama
    Vehicle:
    TRD Off Road Pyrite Mica
    Thanks for the input. I dont have a manual yet because I just ordered the truck.
     
  10. Dec 10, 2010 at 12:14 PM
    #10
    Crom

    Crom Outside...

    Joined:
    Jun 22, 2009
    Member:
    #18782
    Messages:
    8,331
    Gender:
    Male
    First Name:
    Nick
    San Diego, CA
    Vehicle:
    2009 4x4 DCSB Overland Build
    Millions
    I agree with David here. But I would like to add that it makes sense to lockup the rear diff if you're on a very rocky or dicey section of trail where any wheel spin/slip may present some danger. A-TRAC on the front diff and locked in the rear works very well for the crux of some very tough trails.
     
  11. Dec 10, 2010 at 12:45 PM
    #11
    toddt

    toddt Well-Known Member

    Joined:
    Nov 22, 2010
    Member:
    #46560
    Messages:
    58
    Gender:
    Male
    First Name:
    todd
    Houston, TX
    Vehicle:
    2011 D-cab 4x4 TRD OffRoad
    TRD Supercharger, TRD cold air intake, TRD Sport Hood, TRD Exhaust, Pro Comp 6" lift
    I turn everything on just for the hell of it! Even the downhill assist when I am driving on level ground!

    Locker+ATRAC gives the tacoma its highest traction capability.

    Locker is not suggested over 5mph because the chance for loss of vehicle control is higher with the rear end locked.
     
  12. Dec 10, 2010 at 5:55 PM
    #12
    a89aries

    a89aries Well-Known Member

    Joined:
    May 10, 2010
    Member:
    #36897
    Messages:
    142
    Gender:
    Male
    First Name:
    Alex
    London Ontario
    Vehicle:
    09 Tacoma TRD offroad
    I lock the rear diff and treat the A trac like my locking front diff.
     
  13. Dec 10, 2010 at 6:08 PM
    #13
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    9,936
    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
    A-TRAC has no speed limit... something to consider when wheeling. Try the A-TRAC alone and compare to where you used rear lockers before.. I did and found the A-TRAC alone did everything that I used to use the rear locker on.

    It is great to have both... but might as well compare one over the other since you can. Someday Toyota may do away with the rear locker once enough people and magazine writers learn and experience the A-TRAC.

    Until that day, the Rear Locker will be on the TRD Off Road because that's what we off road drivers are asking for.

    Sort of like why they put a fake hood scoop on the Sport TRD... it doesn't do anything, but there are some people who like it on there. :rolleyes::)
     
  14. Dec 10, 2010 at 6:10 PM
    #14
    David K

    David K Well-Known Member

    Joined:
    Jun 27, 2009
    Member:
    #18969
    Messages:
    9,936
    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
    That is a fair enough reason... the locked wheels in back won't periodically check the rotation speed at slip a bit doing so...?
     
  15. Dec 10, 2010 at 6:31 PM
    #15
    nvdeserted

    nvdeserted Well-Known Member

    Joined:
    Nov 27, 2008
    Member:
    #11062
    Messages:
    1,305
    Gender:
    Male
    Reno, NV
    Vehicle:
    2009 Tacoma TRD OR Access Cab
    Electric Dynolock tailgate, TrailGear Slides, , 285/75-16 Yoko Geolanders on Wheelers Type B, SAW 2.0 front and back, Camburg b/j UCA, 1.5" AAL, Ubolt flip, ARB bump.
    ATRAC is great but I still just go straight for the locker. ATRAC takes all the fun out of it.
     
To Top