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75w-85w Front/Rear Differential Gear Oil?

Discussion in '2nd Gen. Tacomas (2005-2015)' started by 4x4cajun, Sep 18, 2018.

Page 2 of 2
  1. Sep 19, 2018 at 6:14 AM
    #21
    96carboard

    #21
    96carboard Well-Known Member

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    Aside from the mobile1 crud in the transfer case.... sure. The transfer case has a synchronizer, and mobile1 does NOT work well with synchromesh until it is blisteringly hot, as anybody who has tried to put that in a manual transmission can attest to.
    140 is probably a little heavier than you need though.
     
    96carboard, Sep 19, 2018
    #21
  2. Sep 19, 2018 at 7:20 AM
    #22
    Harry

    #22
    Harry Science, Bitches

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    I go for the best of both worlds - synthetic AND cheap.

    And it's available everywhere

    [​IMG]
     
    Harry, Sep 19, 2018
    #22
    Rockoma5, TacomaMike37, Lester Lugnut and 2 others like this.
  3. Sep 19, 2018 at 10:05 AM
    #23
    Lester Lugnut

    #23
    Lester Lugnut Well-Known Member

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    Lester Lugnut, Sep 19, 2018
    #23
  4. Sep 19, 2018 at 10:10 AM
    #24
    Grossomotto

    #24
    Grossomotto Complete 3rd Member

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    Exactly, I think it’s very minimal then if you’re hauling weight it’s a moot point.

    That’s what I meant, use either one, they’re really the same.

     
    Grossomotto, Sep 19, 2018
    #24
  5. Sep 19, 2018 at 10:12 AM
    #25
    TireFire

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    TireFire Superunknown Member

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    For those dumb CAFE test Toyota also probably picks a 75lbs 16 year old girl to drive, and downhill with a tail wind haha
     
    TireFire, Sep 19, 2018
    #25
  6. Sep 19, 2018 at 10:24 AM
    #26
    Troyken

    #26
    Troyken Well-Known Member

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    Troyken, Sep 19, 2018
    #26
  7. Sep 19, 2018 at 10:33 AM
    #27
    BillsSR5

    #27
    BillsSR5 Looking out for #1

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    BillsSR5, Sep 19, 2018
    #27
  8. Sep 19, 2018 at 10:34 AM
    #28
    BillsSR5

    #28
    BillsSR5 Looking out for #1

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    BillsSR5, Sep 19, 2018
    #28
    unti likes this.
  9. Sep 19, 2018 at 1:37 PM
    #29
    MilSpec

    #29
    MilSpec Well-Known Member

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    I did all of my gear boxes with dino-type [non-synthetic] 80w-90 at 30K miles... still works well at 43K miles. The slightly higher viscosity won't hurt anything... just may result in a negligible reduction in fuel econ as the oil is slightly thicker.
     
    Last edited: Sep 19, 2018
    MilSpec, Sep 19, 2018
    #29
  10. Sep 19, 2018 at 2:18 PM
    #30
    MilSpec

    #30
    MilSpec Well-Known Member

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    I don't know for sure, but dino may actually be "better" for use as a gear oil due to its more consistent shear strength. A couple of big synthetic makers failed the shear test here: https://www.lastgreatroadtrip.com/wp-content/uploads/2010/11/gear-oil-comparison.pdf

    "Lucas 75/90 Synthetic, at 22.35 cSt, and Royal Purple Max-Gear 75W-90, at 19.32 cSt, both exceed the maximum 18.49 cSt initial viscosity (red), failing the SAE J306 requirements for SAE 90 gear lubricants"

    Having said that, other synthetics passed the test. So, who knows... I just use dino and change it every 30K.
     
    MilSpec, Sep 19, 2018
    #30
    TireFire[QUOTED] and dtaco06 like this.
  11. Sep 19, 2018 at 2:32 PM
    #31
    QChawks

    #31
    QChawks Well-Known Member

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    this is what I used, no problems

    [​IMG]
     
    QChawks, Sep 19, 2018
    #31
  12. Sep 19, 2018 at 8:45 PM
    #32
    [eric]

    #32
    [eric] Well-Known Member

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    [eric], Sep 19, 2018
    #32
Page 2 of 2

Products Discussed in

Mobil 1 104361 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)
$28.00
Red Line 50104 75W85 GL-5 Full Synthetic Gear Oil for Hypoid Limited Slip Differentials - 1 Quart
$23.52
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