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Diff oil wt for locking rear differential?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Mortreport, Jun 22, 2022.

  1. Jun 22, 2022 at 11:48 AM
    #1
    Mortreport

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    Mortreport [OP] Member

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    Hello all,
    Does anyone have a Definitive answer to the type of differential oil I need for my 2015 Taco with locking rear diff? I’ve gotten two answers from auto parts stores. One said 75-85 the other 75-90.
     
    Mortreport, Jun 22, 2022
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  2. Jun 22, 2022 at 11:49 AM
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    EatSleepTacos

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    EatSleepTacos Well-Known Member

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    OEM fluid is 75-85 but that's not a common weight so almost everyone just uses 75-90.
     
    EatSleepTacos, Jun 22, 2022
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    TACO TX, wi_taco, Accipiter13 and 1 other person like this.
  3. Jun 22, 2022 at 12:07 PM
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    Mortreport

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    Mortreport [OP] Member

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    Wow! The 75-85 is twice as much. Thanks much.
     
    Mortreport, Jun 22, 2022
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  4. Jun 22, 2022 at 12:08 PM
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    Mortreport

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    Mortreport [OP] Member

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    Can you tell me the capacity?
     
    Mortreport, Jun 22, 2022
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  5. Jun 22, 2022 at 12:08 PM
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    dfanonymous

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    dfanonymous Well-Known Member

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    dfanonymous, Jun 22, 2022
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    drizzoh and Mortreport[QUOTED][OP] like this.
  6. Jun 22, 2022 at 12:10 PM
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    EatSleepTacos

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    EatSleepTacos Well-Known Member

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    Pretty sure it's 3.1 quarts. Buy 4 quarts and just fill it until it trickles out of the fill plug, make sure the truck is level though.
     
    EatSleepTacos, Jun 22, 2022
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  7. Jun 22, 2022 at 12:51 PM
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    muddog321

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    muddog321 Well-Known Member

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    muddog321, Jun 22, 2022
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  8. Jun 22, 2022 at 12:57 PM
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    eon_blue

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    eon_blue Most Improved Member

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    whatever tickles your fancy, not much difference between those two. No special additive needed for the e-locker, although the LSD additive won't hurt anything if you do use oil with it in there.
     
    eon_blue, Jun 22, 2022
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    NAAC3TACO likes this.
  9. Jun 22, 2022 at 1:09 PM
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    jandrews

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    jandrews Hootin' and Hollerin'

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    75-140 Lucas if you're going to wheel it.

    If you're just tooling around on asphalt 75-90, whatever certed oil is cheapest.
     
    jandrews, Jun 22, 2022
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  10. Jun 22, 2022 at 1:45 PM
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    TnShooter

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    TnShooter The TacomaWorld Stray

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    I can definitively tell you that I’ve run 80w-90 conventional oil in mine for over 6 years now without issues this far.

    But when in doubt, refer to the owners manual.
    Good luck find what ever it is they recommend

    Rear differential carrier assembly:
    2WD: 3.26 to 3.36 litters
    (3.45 to 3.55 US qts, 2.87 to 2.95 lmp. qts)
    Pre, 4WD: 2.75 to 2.85 litters
    (2.91 to 3.01 US qts, 2.42 to 2.50 lmp. qts)


    FWIW, I never got 3 quarts in mine. It started pouring out at the fill hole about 2.5 qts or so.
     
    TnShooter, Jun 22, 2022
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  11. Jun 22, 2022 at 3:05 PM
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    Alealexi

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    Alealexi Well-Known Member

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    Are you confusing e-locker for LSD? They are not the same thing.
     
    Alealexi, Jun 22, 2022
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  12. Jun 22, 2022 at 3:15 PM
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    Alealexi

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    Alealexi Well-Known Member

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    Per the owners manual on my 07 Tacoma.

    API GL-5
    Front: SAE 75-90
    Rear: above -18C ( 0F) SAE 90
    below -18C ( 0F) SAE 80 or SAE 80w - 90

    LSD additive is not required but will not harm it either if it has an e-locker.

    FYI if your are going to do the change I would also recommend to change out the diff breather vent.
     
    Alealexi, Jun 22, 2022
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    Mortreport[QUOTED][OP] likes this.
  13. Jun 22, 2022 at 3:34 PM
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    TnShooter

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    TnShooter The TacomaWorld Stray

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    All E-locker trucks are open diff.
    All 2009+ trucks are open diff.

    I wouldn’t over complicate it.
    Pick one, pour it in, drive it.
     
    TnShooter, Jun 22, 2022
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    Mortreport[OP] likes this.
  14. Jun 22, 2022 at 4:22 PM
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    Mortreport

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    Mortreport [OP] Member

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    Thanks to all. Ordered 75-85 from link. Gonna get the diff breather. This forum rocks!!
     
    Mortreport, Jun 22, 2022
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    Alealexi and TnShooter like this.

Products Discussed in

Lucas Oil 10043 SAE 80W-90 Heavy Duty Gear Oil - 1 Quart
$10.38
Red Line 50104, 75W85 GL-5, Full Synthetic Gear Oil - 1 Quart
$23.53
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