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Limited Slip Differential

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Doctor John, May 2, 2010.

  1. May 2, 2010 at 10:39 PM
    #1
    Doctor John

    Doctor John [OP] Member

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    Are either or both of the differentials (front and rear) in my 2005 4WD Tacoma considered to be "limited slip differentials?" What actually makes it a limited slip and why does this affect the choice of lubricant? Thanks
     
  2. May 2, 2010 at 10:41 PM
    #2
    Mxpatriot

    Mxpatriot Arctic Prerunner

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    Money pit.
    Do you have the Sport model/package?
     
  3. May 2, 2010 at 10:59 PM
    #3
    Doctor John

    Doctor John [OP] Member

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    I'm not sure. Can you tell me where to look to find out? I looked in my manual and didn't see anything specific about this.
     
  4. May 2, 2010 at 11:02 PM
    #4
    Mxpatriot

    Mxpatriot Arctic Prerunner

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    Money pit.
    Do you have "TRD Sport" decals on the side of the bed?

    Is your hood scooped?

    Do your bumpers and door handles match the paint of your truck?

    If yes - then you have a sport. And if it's an '05 as indicated in your profile, then you have a true LSD.
     
  5. May 2, 2010 at 11:05 PM
    #5
    RelentlessFab

    RelentlessFab Tacoma offroad armor fabricating beast Vendor

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    Even if the truck is just an SR5, the LSD could have been optioned into it, as was the case with my truck. Look at the rear differential, if there is a sticker on it that reads something like "LSD oil only" then you obviously have the LSD in there. Or if you have the original window sticker from when it was new, it will show the options added to the truck. If all else fails, give the dealer your VIN# and they can tell you.
    The reason for the LSD additive in the oil is as a friction modifier as the design of the Tacoma LSD is that of clutches that create a counter force helping the tire with less traction slip less and find traction.
     
  6. May 3, 2010 at 6:52 AM
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    05Moose

    05Moose Middle-Aged Member

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    Yeah, most of the '05 SR5 packages had the LSD as part of the package. I had the SR5 package #8 and it came as part of the SR5 package. In fact, most of the SR5's sold around here had it! Now if you had a TRD Sport, then it's a given that you have it. The advice highlighted above is your best bet for figuring it out. That sticker will still be there, so don't worry about the possibility of it having come off over time.
     
  7. May 3, 2010 at 7:42 AM
    #7
    luk8272

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    Your front is open unless you have a locker or Atrac. Both of these will have buttons to either engage or disengage.
     
  8. May 3, 2010 at 7:52 AM
    #8
    Janster

    Janster Old & Forgetful

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    If you have the LSD (mechanical) in the rear - you need friction modifier in the oil for the LSD to work properly. There are clutch paks in the diff and without the friction modifier, the rear will be 'grabby' and not function properly (hard to explain).
     
  9. May 3, 2010 at 9:09 AM
    #9
    David K

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    If you get the truck stuck in the mud or sand .... does just one tire (in back) spin, neither, or both?
     
    GoLongJoe likes this.
  10. May 3, 2010 at 9:11 AM
    #10
    David K

    David K Well-Known Member

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    A-TRAC was available in Tacomas starting in 2009. No 'factory' locker was offered for the front.
     
  11. May 4, 2010 at 5:40 AM
    #11
    Doctor John

    Doctor John [OP] Member

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    The decal on the side of the bed says TRD OFF ROAD Toyota Racing Development. The other body labeling says V6 SR5. The paint and bumper color is silver but the door handles are black. I don't think the hood is scooped. There is no LSD sticked on the rear differential. The description on the sticker is "6 speed manual transmission,4W demand 4x4 system w/ electronically controlled 2 speed transfer case."
     
  12. May 4, 2010 at 5:51 AM
    #12
    luk8272

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    Correct so he has an open front diff!
     
  13. May 4, 2010 at 6:56 AM
    #13
    05Moose

    05Moose Middle-Aged Member

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    Sounds like you don't have a limited-slip rear differential then because it doesn't have the sticker on the rear differential...and more importantly because it sounds like you have the TRD Off-Road package. That package comes with a locking rear differential which can't be combined with a mechanical limited-slip. To know for sure that you have the TRD Off-Road package (and that someone didn't just stick the sticker on your bed), you should have a button on the dash for the locker (and you will also have the temp/compass display overhead).
     
  14. May 4, 2010 at 6:59 AM
    #14
    David K

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    Other than a manual tranny, you have the same truck I had last (2005 4WD Off Road Tacoma) which HAS an electronic switch activated locking rear differenial (NOT limited slip). Both differentials are 'open'.

    The rear locker only works in L4 (Low Range), come to a stop to engage. Info sticker on drivers door.... RR Diff light goes from flashing to solid when engaged.
     
  15. Oct 26, 2016 at 11:13 AM
    #15
    hueman562

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    Anybody run redline gear oil with the redline friction modifier. It says that there is already the friction modifier inside and doesn't need anymore, anybody have any opinions on this
     
  16. Oct 26, 2016 at 11:26 AM
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    asuchemist

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    If it says it has it I would say you are okay. I used Valvoline gear oil (Limited Slip) and the friction modifier that dealer used.
     
  17. Oct 26, 2016 at 11:33 AM
    #17
    Lester Lugnut

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  18. Oct 26, 2016 at 11:58 AM
    #18
    tranandya

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    You dont have a LSD.
     
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