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Rear differential Oil ?

Discussion in '1st Gen. Tacomas (1995-2004)' started by jacksj1, Sep 1, 2017.

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  1. Sep 1, 2017 at 1:59 PM
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    jacksj1

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    jacksj1 [OP] Well-Known Member

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    Couldn't find a relevant thread but I know my 01 4x4 with the locking rear diff calls for SAE 90 hypoid gear oil but I can't seem to find it. What should I put in it? Any help would be much appreciated!
     
    jacksj1, Sep 1, 2017
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  2. Sep 1, 2017 at 2:41 PM
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    onakat

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    onakat Well-Known Member

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    onakat, Sep 1, 2017
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  3. Sep 1, 2017 at 2:46 PM
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    jacksj1

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    jacksj1 [OP] Well-Known Member

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    No, my manual calls for sae 90 hypoid gear oil for the rear diff and 75-90 for the manual trans and transfer
     
    jacksj1, Sep 1, 2017
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  4. Sep 1, 2017 at 4:43 PM
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    onakat

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    onakat Well-Known Member

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    ah, yeah, the "SAE 90" oil.... They usually have some at walmart, canadian tire and auto part stores.
    SAE 90 would be 90w-90, but it does not exist...you can replace it with 80w-90, as it is what would be the closest
     
    onakat, Sep 1, 2017
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  5. Sep 1, 2017 at 4:52 PM
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    Clearwater Bill

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    Clearwater Bill Never answer an anonymous letter

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    What is the GL spec called for? Thats important to get right.
     
    Clearwater Bill, Sep 1, 2017
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  6. Sep 1, 2017 at 4:58 PM
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    The Driver

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    The Driver Trail Runner/Barefoot Beach Runner/Snow Skier

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    The Driver, Sep 1, 2017
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  7. Sep 1, 2017 at 5:06 PM
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    eon_blue

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    eon_blue Most Improved Member

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    04 e-locker here, I use Valvoline 75w90 in mine.
     
    eon_blue, Sep 1, 2017
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  8. Sep 1, 2017 at 5:09 PM
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    12taco12

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    12taco12 Well-Known Member

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    12taco12, Sep 1, 2017
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  9. Sep 1, 2017 at 5:13 PM
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    Bsheriff11

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    Most standard oils give the additives in them to reduce the slip that hypoid bevel gears produce, lucas oil is a great lubricant that i personally use, but mobil, valvoline, Pennzoil, etc will be fine as well.
     
    Bsheriff11, Sep 1, 2017
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  10. Sep 1, 2017 at 5:40 PM
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    RVA_TRD

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    RVA_TRD Well-Known Member

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    RVA_TRD, Sep 1, 2017
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  11. Sep 1, 2017 at 7:26 PM
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    Sicyota04

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    Sicyota04 Slowly but surely.

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    I used RP 75w90 in front diff, transfer case and rear E locker diff. And no I never tow anything.
     
    Sicyota04, Sep 1, 2017
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  12. Sep 1, 2017 at 7:28 PM
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    NM Lance

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    NM Lance Well-Known Member

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    This has always concerned me too. You can use 80W-90, but it is only intended for temperatures less than 0 deg F. I went to the dealership to see if I could get some SAE 90 and the parts guy told me all they use is 80W-90. I have always used 80W-90 and haven't had any issues, at least not yet. 260,000 miles and counting... no issues.

    I don't know if it makes a big difference, but this is always at the back of my mind when I change the rear diff oil.
     
    Last edited: Sep 2, 2017
    NM Lance, Sep 1, 2017
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  13. Sep 1, 2017 at 7:29 PM
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    NM Lance

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    NM Lance Well-Known Member

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    I checked a tractor supply store and they carried straight SAE 90, but it was not for hypoid service. I wonder if there is an additive that can make it useable?
     
    NM Lance, Sep 1, 2017
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  14. Sep 1, 2017 at 7:43 PM
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    Bsheriff11

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    Bsheriff11 Remember Your ABC's. Always. Be. Casual.

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    Why? Just go grab some Pennzoil from advance and change it every 30K or sooner depending on driving style. I promise, that rear diff will live for longer than the truck with shitty ass oil if you ain't driving it hard offroad and bouncing it.
     
    Bsheriff11, Sep 1, 2017
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  15. Sep 1, 2017 at 7:45 PM
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    NM Lance

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    NM Lance Well-Known Member

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    My only real concern is, it gets over 100 F just about every day in the summer where I live. Otherwise, I probably wouldn't blink an eye. I also use cheap oil, usually SuperTech, or whatever is on sale at Walmart.
     
    NM Lance, Sep 1, 2017
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  16. Sep 1, 2017 at 7:54 PM
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    TRVLR500

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    TRVLR500 Well-Known Member

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    I use all Amsoil in my 2004 2.7 RC 4X4. 75-110 severe gear in front and rear diffs and Amsoil GL 4 in the trannny. MMMMM. I forget what I put in the transfer case but it was what Amsoil recommends. Probably 75-90.
     
    TRVLR500, Sep 1, 2017
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  17. Sep 1, 2017 at 9:20 PM
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    Bsheriff11

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    Bsheriff11 Remember Your ABC's. Always. Be. Casual.

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    Diff's get warm regardless. If you use shitty oil change it sooner. If you offroad a lot and use shitty oil then change it even sooner. Theres a balance and money can be saved by using cheaper oil, just be weary of your driving style, running through water, hard on the gas, etc. If you put your hand on the rear diff and it burns the hell out of you, probably would be best to use better oil! I just try for the cheapest most common sense stuff for me and my terrain. Everyone will be different.
     
    Bsheriff11, Sep 1, 2017
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  18. Sep 2, 2017 at 8:02 AM
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    opteron

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    opteron Well-Known Member

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    I use Valvoline for all fluids....
     
    opteron, Sep 2, 2017
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  19. Sep 2, 2017 at 9:43 PM
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    ThunderOne

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    ThunderOne Well-Known Member

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    Use a 100+ weight then, like 85-140. Hell, ECGS insists to use 85-140 dyno in their diffs: http://eastcoastgearsupply.com/ft-2536-ecgs-gear-oil-recommendation.html

    Also: useful video.. explains oil weights and the XXw-XX oils.
    https://youtu.be/tYkg0oDUXs8
     
    ThunderOne, Sep 2, 2017
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  20. Sep 2, 2017 at 11:08 PM
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    mechanicjon

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    mechanicjon They call me "Jonny Stubs"

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    Hypoid beveled gears don't slip. The additive is for positrack type differentials with clutch packs. Our e-lockers are mechanically engaged by a sliding splined collar. Additive is not required.

    I run Mobil1 75-90 synthetic in my elocker.
     
    mechanicjon, Sep 2, 2017
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