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LSD vs Auto LSD

Discussion in '2nd Gen. Tacomas (2005-2015)' started by rcastle57, Oct 26, 2010.

  1. Nov 14, 2010 at 7:15 PM
    #21
    Foihdzas

    Foihdzas What is hummingbird?

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    The only problem I have with the new computer controlled LSD is that it retards the engine, and when you need engine speed AND LSD, you can't get both...
     
  2. Nov 14, 2010 at 7:36 PM
    #22
    whippersnapper02

    whippersnapper02 Well-Known Member

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    ALSD does not limit engine power. Only Trac does.
     
  3. Nov 15, 2010 at 8:25 AM
    #23
    David K

    David K Well-Known Member

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    ONLY IN 2WD TRAC, NOT IN 2WD AUTO LSD and NOT IN 4WD.

    (you see friends, even though this information has been posted by me for a year and many others, people still don't know how it works)

    This used to be my signature... It is the 9 drive modes we '09+ Off Road 4WD Tacomas have:

    1) 2WD: VSC and TRAC active, engine regulated ('Limited Slip Lite').

    2) 2WD: 'AUTO LSD' ('TRAC OFF MODE'). No engine regulation for 'strong' limited slip.

    3) 2WD: 'VSC OFF MODE' (TRAC is off for 'open differential').

    4) 4WD-Hi: VSC and TRAC active. No engine regulation for 'strong' limited slip.

    5) 4WD-Hi: 'VSC OFF MODE' (TRAC is off for 'open differentials').

    6) 4WD-Lo: VSC and TRAC are both off in L4 ('open differentials').

    7) 4WD-Lo: 'A-TRAC' on gives a 'locker-like, super strong' limited slip, front and rear.

    8) 4WD-Lo: Rear Differential Locked and open front differential (A-TRAC off).

    9) 4WD-Lo: RR DIFF LOCK + A-TRAC on, 3 MPH limit.

    Only the Off Road 4WD Tacomas have a hydraulic brake booster (for the A-TRAC system).

    Now, the 2WD Tacomas have modes 1-3 and the Off Road 2WD Tacomas have 1-3 + a locking rear differential.

    The 4WD non-Off Road Tacomas have modes 1-6.
     
  4. Nov 15, 2010 at 8:26 AM
    #24
    David K

    David K Well-Known Member

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    and only TRAC in 2WD does...
     
  5. Aug 29, 2012 at 4:31 PM
    #25
    Milowilli

    Milowilli Milowilli

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    Auto LSD is crap!!! We installed a TRD mechanical LSD along with rear disc brakes in our truck. Auto LSD uses rear drum brakes which do not hold in mud and slush and only last 2 to 3 months before the liners are totally gone....making Auto LSD totally useless.
     
  6. Aug 29, 2012 at 10:56 PM
    #26
    JKD

    JKD Well-Known Member

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    I would be concerned about the manual LSD interfering with the operation of VSC, if the truck is trying to brake one or the other rear wheel to avoid a skid.
     
  7. Aug 29, 2012 at 11:08 PM
    #27
    ScreamingTaco

    ScreamingTaco Huge Member

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    Two year old thread is two years old...
     
  8. Aug 29, 2012 at 11:08 PM
    #28
    David K

    David K Well-Known Member

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    Wondering why you have not been happy with the electronic brake system or the drum brakes?

    I have had rear drum brakes on 3 Tacomas totaling about 300,000 miles and have never had them fail or need to be replaced. The big semi trucks use drum brakes... they have a much larger braking surface area than disc pads do. Disc brakes are just easier to replace and service.

    Far too many here have stated their AUTO LSD works great for getting up boat ramps or other slippery surfaces in 2WD... So, maybe there is something not working on just YOUR AUTO LSD??? Could it be???

    Sorry your Tacoma wasn't working as good!
     
  9. Aug 29, 2012 at 11:25 PM
    #29
    Gearheadesw

    Gearheadesw Well-Known Member

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    In 4 hi with low traction available, the power is cut in the engine. Going up deep sand hills with the pedal floored, first gear, searching for traction, then... buurr, revs come down power decreases forward momentum stops. No tire spin no nothing. Back up turn off all nannies, zing right up the hill we go. Tell me how that system works great.
     
  10. Aug 30, 2012 at 12:53 AM
    #30
    romeo

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    Do you have pictures of the process and maybe even a price sheet of how much it cost to do the switch from drum to disk?
     
  11. Aug 30, 2012 at 5:56 AM
    #31
    Milowilli

    Milowilli Milowilli

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    I got the kit from here.


    http://tundraracing.com/rbck.htm
     
  12. Aug 30, 2012 at 6:09 AM
    #32
    Milowilli

    Milowilli Milowilli

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    I think you need an education..We use these trucks OFF ROAD!!!! A trip in the interior could be as much as 600 miles. The road is full of pot holes filled with water requiring hundreds of brake applications. The sandy slush grit mud gets between the liner and drum and is crushed..grinding away the liner and drum. At replacement the drum is so badly worn it has to be trashed. It's a job in itself to separate the drum from the liners as a lip develops due to wear and the liners get stuck behind them. You have to go through the tedious process of trying to back off the liner tension so it clears the lip to be removed. Disc brakes wipe instead of crushing and grinding like drum brakes do so they last much longer and are far more reliable!!!
    The Auto LSD becomes useless when drum brakes become wet and worn.
    I have changed rear brakes in as little as 2 trips on the jungle.
    Cheers.
     
  13. Aug 30, 2012 at 6:10 AM
    #33
    Milowilli

    Milowilli Milowilli

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    No issues here..works almost like a rear locker with Auto LSD engaged.
     
  14. Aug 30, 2012 at 6:19 AM
    #34
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Power is not cut when in 4we high with TRAC on.
     
  15. Aug 30, 2012 at 7:32 AM
    #35
    Milowilli

    Milowilli Milowilli

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    Imagine Auto LSD in this mess...that is abrasive muddy clay ..it eats drum brakes for lunch and dinner!!!
    [​IMG]
     
  16. Aug 30, 2012 at 7:38 AM
    #36
    ScreamingTaco

    ScreamingTaco Huge Member

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    It is in the 2012s.

    H4 TRAC on = Engine retarder and limited slip light
    H4 TRAC off (press button) = Full engine power with strong limited slip.
    H4 TRAC off (hold button) = Full engine power with open diffs and no VSC.

    Basically, TRAC functions the same in H2 and H4 now.

    Myself, after 5 years of driving with the mechanical LSD that was in the early Sports I can say it performs awesome both on and off road... except in the winter. The rear end tends to wash out on slippery surfaces, which is always interesting at highway speeds.


    (edit: nevermind... When I first checked Milowilli's profile I was pretty sure it said he was in a 2012, but now it says he's in a 2005.... Which is even more confusing since a 2005 doesn't have any traction controls)
     
  17. Aug 30, 2012 at 7:55 AM
    #37
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Yet another reason why not to buy a 12.:D

    TRAC has been optional since 04.
     
  18. Aug 30, 2012 at 8:54 AM
    #38
    BlueT

    BlueT Well-Known Member

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    You not gonna win with David K he is stuborn as mule and he thinks we all live in California like conditions :D
     
  19. Aug 30, 2012 at 9:12 AM
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    MonkeyProof

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  20. Aug 30, 2012 at 9:15 AM
    #40
    whippersnapper02

    whippersnapper02 Well-Known Member

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    FIFY.
     
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