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75W-90 gear oil for both diffs and transfer case

Discussion in '2nd Gen Tundras (2007-2013)' started by epicurese, Aug 6, 2023.

  1. Aug 6, 2023 at 7:30 AM
    #1
    epicurese

    epicurese [OP] New Member

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    I'm planning to use “Valvoline SynPower SAE 75W-90 Full Synthetic Gear Oil” to do a drain and fill for both diffs and the transfer case. This oil is API GL-5/GL-4 compatible. This is an 08 5.7L Tundra.

    For the transfer case, I believe this will be compatible with the recommendation from the owner's manual.

    However, the owner manual states 75W-85 for both of the diffs. Will the 75W-90 be an issue here? I suspect the slightly increase viscosity of my proposed 75W-90 shouldn't be an issue, but I do live in a colder climate (USDA Zone 5, -20 F).
     
  2. Aug 6, 2023 at 8:08 AM
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    Retired...finally

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    I put the Valvoline in my rear differential a few hundred miles ago and the rear end hasn't exploded yet
     
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  3. Aug 6, 2023 at 8:44 AM
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    epicurese

    epicurese [OP] New Member

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    That's good. You used the 75W-90 grade?
     
  4. Aug 6, 2023 at 9:28 AM
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    C.I.

    C.I. Surf, off road, sleep, repeat

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    75w90 on the diffs is fine, but I would not risk it on the transfer, that one is a straight 75 and sadly there's not many quality 75w80 oils to stay in a safe range.
     
  5. Aug 6, 2023 at 9:30 AM
    #5
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    I used this exact oil in the transfer cases and differentials in my Tundra and AWD Highlander at 30k miles.

    Great price for a case of 12 on Amazon, I think it’s about 1/2 price of Amsoil severe gear. No explosions here either.
     
  6. Aug 6, 2023 at 9:39 AM
    #6
    epicurese

    epicurese [OP] New Member

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    I think the owner manual actually states SAE 75W-90 for the transfer (screenshot below):

    upload_2023-8-6_11-39-5.png
     
  7. Aug 6, 2023 at 9:49 AM
    #7
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    Maybe they changed the recommendation over the years. My 2021 recommends 75W in the manual. C8774595-906B-4755-8F3D-1969C717153A.png
     
  8. Aug 6, 2023 at 9:57 AM
    #8
    Iesurfer

    Iesurfer New Member

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    On Amazon there’s a German company I think revanol that makes it I use it and so do a lot of folks on tacomaworld much cheaper than the oem one that comes in a can from Toyota
     
  9. Aug 6, 2023 at 9:59 AM
    #9
    Winning8

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    That's why I only change diff oil with valvoline synpower 75w-90, cause I can't find them 75w transfer case oil.
     
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  10. Aug 6, 2023 at 10:00 AM
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    Iesurfer

    Iesurfer New Member

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  11. Aug 6, 2023 at 10:09 AM
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    TundraMcGov.

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    My 2017 transfer case is specified for single viscosity 75W.
     
  12. Aug 6, 2023 at 10:19 AM
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    Winning8

    Winning8 New Member

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    I was going to order some Red-Line MT-LV.
     
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  13. Aug 6, 2023 at 10:28 AM
    #13
    MEWaters

    MEWaters New Member

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    Live in Maine and put 25k on rear with valvoline and no concerns. Over 300k miles on the gears
     
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  14. Aug 6, 2023 at 10:41 AM
    #14
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    I trust this guy, he says 75W-90 is fine for both diffs and x-fer cases. My Dad’s 2010 specifies 75W-90 and it was changed to straight 75W sometime after.
    https://youtu.be/3le9ZT5HUlk
     
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  15. Aug 6, 2023 at 10:47 AM
    #15
    Shanet421

    Shanet421 (Semi) New Member

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    Transfer case manufacturer changed in 2014 as did the fluid.

    https://tundraheadquarters.com/borgwarner-toyota-tundra-transfer-case/
     
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  16. Aug 6, 2023 at 10:52 AM
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    Tsm503

    Tsm503 Nothing to see here

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    75w90=:thumbsup:
     
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  17. Aug 6, 2023 at 11:09 AM
    #17
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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  18. Aug 6, 2023 at 11:42 AM
    #18
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    I stand corrected - found the owner’s manuals and the change from 75W-90 to 75W did happen in 2014. Maybe I ought to reconsider my opinion.

    @epicurese if you have a 2008 model year 75W-90 GL-5 is the correct oil for the transfer case.
     
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  19. Aug 6, 2023 at 12:03 PM
    #19
    CTundraForMe

    CTundraForMe New Member

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    Whatever you put in there, use good stuff. That rear diff is used 100% of the time the truck is moving.
     
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  20. Aug 6, 2023 at 12:26 PM
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    Retired...finally

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    For some reason all the link gives me is Tundra accessories.
     
  21. Aug 6, 2023 at 12:27 PM
    #21
    Retired...finally

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    Yep. Same as you mentioned I believe. Squeeze bags from Walmart. 4.
     
  22. Aug 6, 2023 at 12:29 PM
    #22
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    Sorry, didn’t actually link it there.

    Valvoline SynPower SAE 75W-90 Full Synthetic Gear Oil 1 QT, Case of 12 https://a.co/d/30CeBjq
     
  23. Aug 6, 2023 at 12:33 PM
    #23
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    Wow that is a GREAT price right now. I paid $141 a couple months ago.
     
  24. Aug 7, 2023 at 10:29 AM
    #24
    bjohnson425

    bjohnson425 New Member

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    Weird for my Sequoia which is the exact same engine/trans/ tow package the manual says 75W-90 for both my 2017 and 2021.
     
  25. Aug 7, 2023 at 11:25 AM
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    Shanet421

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    Are your Sequoias 4wd?
     
  26. Aug 8, 2023 at 10:59 AM
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    bjohnson425

    bjohnson425 New Member

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    I reckon they wouldn't have a transfer case if they weren't LOL yes they are both 4WD.. I suppose there is one BIG difference I forgot about the Sequoia has a torsen center locking diff.
     
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  27. Aug 8, 2023 at 11:46 AM
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    SnrDisregardo

    SnrDisregardo New Member

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    High Performance Lubricants can do the 75w-85 and the 75w
     
  28. Nov 21, 2023 at 10:44 AM
    #28
    Tbrandt

    Tbrandt I read it on an internet forum, it must be true.

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    I switched to Redline MT-LV GL-4 in the transfer case, mainly out of concern that this Borg Warner transfer case appears to have a brass synchronizer. I don't want to run into issues with the GL-5 additives in my Valvoline 75W-90 eating away at the synchronizer. Cold weather performance was the second consideration, most of my 4x4 use is in the winter.

    I'm also amazed at how dark the front differential oil was at 30k miles, basically the same as the rear diff. The drain plug magnet also had a significant amount of metal sludge on it as well. The transfer case was as clean as honey at 30k miles and I honestly expected the front differential to be the same given my limited 4HI use and essentially zero 4LO use except for pulling a van-lifer out the ditch in Whistler, BC last summer. I'm guessing that the front axles spinning the gearset in the front differential still causes wear over the 2HI miles.

    I'm figuring on doing differentials every 30k miles and feel comfortable extending the transfer case out to 60k miles.
     
  29. Nov 23, 2023 at 2:28 PM
    #29
    danny.fuzz@ Yahoo.com

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    I use 75 w90 full synthetic it's about $60 a gallon at the auto parts store no issues so far
     
  30. Nov 25, 2023 at 2:23 PM
    #30
    riding4life162

    riding4life162 New Member

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    I see this is an older be post and the OP has already change his diff fluid, so this is for the next person inquiring. I’ll be changing my diff fluid in a few minutes, just stopped by my local Toyota dealer to grab some fluid and they literally said they only stock 75w-90. And at that they only only carry conventional (non-full synthetic ) valvoline 75w-90.

    IMG_0412.jpg
     
    Last edited: Nov 25, 2023

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