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Offroad or Sport - In terms of the Rear Diff

Discussion in '2nd Gen. Tacomas' started by Negative1, Feb 25, 2009.

  1. Negative1

    Negative1 [OP] Well-Known Member

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    Since were shopping for a new truck, I really want the Offroad because of the extras like skid plates, rear diff lock.

    3 Questions:

    1.) What else does the Offroad model have that the Sport does not?

    2.) On the offroad model, when the rear diff lock is not on, does it act like an open Diff? Or is it still a LSD?

    3.) Can you engage and disengage the rear diff lock while driving, at any speed, or this something you should avoid for premature damage?

    I'm just wondering for winter conditions, while driving if I need more traction in 2WD, if I can just push the rear diff lock on to help out.


    Thanks!:)
     
  2. Janster

    Janster Old & Forgetful

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    2) When the locker is not on - it's an open diff.

    3) The locker (as equipped from the factory) can only be engaged while in 4lo range at 5mph (4WD trucks only). **there is a modification you can do to force the locker to engage in 4hi - but that is something you do on your own - and - not necessarily covered under warrantee if something breaks while using the locker in 4hi.

    I'm not familiar with the PreRunner TRD Offroad - so I can't personally comment on that.
     
  3. Negative1

    Negative1 [OP] Well-Known Member

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    So you only have 1 tire spinning no matter what when in 2WD, regardless of whether the locker button is engaged or not..

    This sucks.... Your better off with a LSD for winter...
     
  4. harshest

    harshest I am the Sofa King

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    Toyota.com

     
  5. jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Staff Member

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    wat?
    1.) offroad has a plastic skid plate for the gas tank, lack of scooped hood, color matched everything, but has the rear lock which is king

    2.) on the 09's only, when the rear locker is off, u can still use the auto lsd...its an open diff, but the auto lsd works

    3.) everyone i've heard/seen know when to use it before they get to that point, so engage it at a stop

    I'm just wondering for winter conditions, while driving if I need more traction in 2WD, if I can just push the rear diff lock on to help out.

    and to this, u have vsc that will help out as well as the auto lsd when in 2wd



    the options for the sport that u pulled are flawed b/c they dont mention the vsc+trac at all....or the auto lsd
     
  6. Negative1

    Negative1 [OP] Well-Known Member

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    This is why I asked, because I'm finding conflicting information...

    So the Offroad model, has a LSD differential and is NOT an open Diff...

    BTW, I'm talking about the 6Spd manual Offroad truck, if that makes any difference?
     
  7. Janster

    Janster Old & Forgetful

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    The Offroad model does NOT have the LSD differential.

    There are two different types of LSD.

    The 05-08 model trucks can be equipped with the mechanical LSD which is inside the differential.

    The 09 trucks have an AUTO LSD which uses the brakes/ABS system to pulsate the brakes to stop the spinning tires. It has nothing to do with the differential.

    The 05-08 trucks can't have both the mechanical LSD & locker at the same time.

    The 09 trucks can have the AUTO LSD & the locker at the same time.
     
  8. jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Staff Member

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    wat?
    DING DING!!! janster is one smart chica!
     
  9. allpro

    allpro Well-Known Member Vendor

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    Don't forget that the Sport rear end is slightly bigger - 8.4 vs 8.0 on the Off-road. I've had both. The rear e-locker is nice, but after breaking 2 sets of gears I decided to go with the Sport this time around. The LSD works better than I thought it would but I'm getting a Detroit soon. Plus now I have a cool hood scoop! :D
     
  10. bmkshort

    bmkshort Active Member

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    My 09 manual says the AUTO-LSD can only be used on 2WD models and 2WD mode on 4WD models. Pg. 176. I was curious as to their wording so
    I checked it for myself and sure enough, it would only activate in 2WD.
    I've only had this truck for a week now so I'm still learning.

    As for the AUTO-LSD not having anything to do with the differential, you are correct as with the AUTO-LSD equipped trucks have an open conventional type of differential vs. the mechanical type that use springs and clutch paks to tranfer torque.

    But, the AUTO LSD does work with the differential in the sense that it does this when the system detects wheel spin and applies brake pressure to that wheel. It forces the differential to transfer the torque to the other wheel. Its actually pretty ingenious. It allows the use of the traditional reliable (basically maint-free) open-type differential to be used. To better understand the physics behind the madness, it helps to have a good understanding of how differentials work to begin with. As far as the different ways Toyota uses the VSC,TRAC,and so forth, i'm still learning.

    Here is an interseting link to a site that expains how differentials work.
    http://auto.howstuffworks.com/differential2.htm
     
  11. Delmarva

    Delmarva Mayor of TW

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    allpro">
    :woot: It's Allpro! :D

    Welcome to TW :wave:
     
  12. jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Staff Member

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    wat?
    lol...no shit....must be john, sarah, or pepe....terry already has a login
     
  13. Delmarva

    Delmarva Mayor of TW

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    lol... no shit... saw terry as a member a while ago...

    welcome to post 1 of allpro... :rolleyes:
     
  14. jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Staff Member

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    wat?
    from the profile, i think the 08 DC is sarah...
     
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