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Consensus on front diff oil

Discussion in '3rd Gen. Tacomas (2016+)' started by Hank Heel, Sep 11, 2018.

  1. Sep 11, 2018 at 12:40 PM
    #1
    Hank Heel

    Hank Heel [OP] Well-Known Member

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  2. Sep 11, 2018 at 12:46 PM
    #2
    nh_yota

    nh_yota Well-Known Member

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    Your front diff does much less work than your rear diff so I don't think anything special is necessary. I use Valvoline Synthetic 75W90 in both diffs because I can get it cheap on sale.
     
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  3. Sep 11, 2018 at 12:47 PM
    #3
    BassAckwards

    BassAckwards Well-Known Member

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    [​IMG]
     
    Last edited: Sep 11, 2018
  4. Sep 11, 2018 at 12:50 PM
    #4
    tonered

    tonered tacorider

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    Less work, yes, but due to the ADD, the spiders are always whirring around. I'd always change it when changing the rear. Using just 1.6qt, it doesn't hurt much.

    There was another diff lube thread around here that had a 'study' in it sponsored by AmSoil. Reading it with a critical eye shows that just about any full-synth diff lube is plenty fine.
     
  5. Sep 11, 2018 at 12:52 PM
    #5
    Hank Heel

    Hank Heel [OP] Well-Known Member

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    Good to know, though subjective, whats better RP or mobile 1?
     
  6. Sep 11, 2018 at 12:54 PM
    #6
    nh_yota

    nh_yota Well-Known Member

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    Agreed and that's why I always change them both at the same time.
     
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  7. Sep 11, 2018 at 12:55 PM
    #7
    nh_yota

    nh_yota Well-Known Member

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    2" Lift with HS coils/AAL and 5100s, TRD Exhaust, TRD Skid Plate, URD Short Shift, AT3s
    Just like engine oil, it's more important that you change it regularly than which brand you use.
     
  8. Sep 11, 2018 at 12:57 PM
    #8
    Hank Heel

    Hank Heel [OP] Well-Known Member

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    The reason im not touching rear diff, is because i just had toyota completely reseal and refill it last month. It was their third attempt at stopping rear diff leak, seems ok now. So with that said rear diff fluid is brand new, along with all the hardware
     
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  9. Sep 11, 2018 at 12:58 PM
    #9
    Grossomotto

    Grossomotto Complete 3rd Member

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    39.9526° N, 75.1652° W
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    75W90 Redline or Amsoil (only Group V) synthetics. Change every 60k miles or do whatever you want.
     
  10. Sep 11, 2018 at 1:00 PM
    #10
    Hank Heel

    Hank Heel [OP] Well-Known Member

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    As a previous E46 M3 owner of 12 years, RedLine oils have great initial specs, but loses its properties quick, so the consensus for redline was to change it often.
    And i agree, motor oil is under much more strain that a front diff that is hardly used
     
  11. Sep 11, 2018 at 1:08 PM
    #11
    nh_yota

    nh_yota Well-Known Member

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    I've heard the same - I use RedLine MT90 in my manual transmission/transfer case and change it every 30k.
     
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  12. Sep 11, 2018 at 1:12 PM
    #12
    tonered

    tonered tacorider

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    I went with M1 just because it was more available and priced well.
     
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  13. Sep 11, 2018 at 1:14 PM
    #13
    Grossomotto

    Grossomotto Complete 3rd Member

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    Which properties? As in TBN? Did you do an oil analysis? All oils Dino and Synthetic will shear down to lower weights especially at the 15K BMW OCI.

    The good thing with Redline is their weights are higher on the visco scale, ie their 0W20 is almost a 30wt.

    FWIW, Redline is one of the only Group V polyol Ester based pure synthetics on the market.

     
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  14. Sep 11, 2018 at 1:25 PM
    #14
    BarcelonaTom67

    BarcelonaTom67 Well-Known Member

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    I've been using Amsoil oil and gear lubes in my vehicles since the late 90's. Since I don't have any experience with other synthetics, I can offer no comparisons, but have never had a single issue with any Amsoil product.
     
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  15. Sep 11, 2018 at 1:26 PM
    #15
    Hank Heel

    Hank Heel [OP] Well-Known Member

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    Yes I know most of this only because BMW’s OG 10w-60 oil for s54’s was ester based, which they later did away with causing uproar among the community. I’m not arguing that redline is bad, it’s great for high duty cycles with frequent intervals.
    I digress though, my diff doesn’t see abuse, I’ll go with rp.
    Thanks for your knowledgeable input
     
  16. Sep 11, 2018 at 1:28 PM
    #16
    AR15xAR10

    AR15xAR10 #blackriflesmatter

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    Heh, wouldn't you like to know
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    Please refer to my build thread (click signature picture)
    CAN CONFIRM
     
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  17. Sep 11, 2018 at 1:30 PM
    #17
    Grossomotto

    Grossomotto Complete 3rd Member

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    Right on, any gear oil will last 60k miles. Some owners never change it for 250k

     
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  18. Sep 11, 2018 at 1:56 PM
    #18
    Hank Heel

    Hank Heel [OP] Well-Known Member

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    If only it were readily available
     
  19. Sep 11, 2018 at 3:16 PM
    #19
    JoeCOVA

    JoeCOVA IG @MightyJoeFlannel

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  20. Sep 11, 2018 at 3:18 PM
    #20
    Vbpiper

    Vbpiper Well-Known Member

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    Mobil 1. Readily available, major manufacturer, been around forever, decent price.
    Is it the best? I don't know and I don't care. It will get my truck to 300,000 miles as well as any other brand, I believe, and for less money than RP or Amsoil.
    How many differentials fail due to lubrication issues when the oil has been changed regularly?
     

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