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Best differential fluid to use

Discussion in 'General Tundra Discussion' started by Oregon 1 Toyo, May 9, 2018.

  1. May 9, 2018 at 9:02 PM
    #1
    Oregon 1 Toyo

    Oregon 1 Toyo [OP] New Member

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    Is the general consensus that mobil 1 synthetic 75w90 is one of the best to use for tundra differentials? Also is it really necessary to replace the washers when you change differential fluid?
     
    Last edited: May 12, 2018
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  2. May 9, 2018 at 9:06 PM
    #2
    Trooper2

    Trooper2 Premium Lone Star Member / SSEM #13

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    Can't go wrong with Mobil 1 Synthetic in the diff. There may be something more severe duty for 4x4's that I am not aware of.
     
  3. May 9, 2018 at 9:20 PM
    #3
    Oregon 1 Toyo

    Oregon 1 Toyo [OP] New Member

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    Thanks I hear royal purple is good but pricey.
     
  4. May 10, 2018 at 3:32 AM
    #4
    Spvrtan

    Spvrtan Amateur fabricator

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    Mobile 1 75w-90 is great for most owners. I was using it for a while early on but switched to Lucas 75w-90 a few oil changes ago. Both are good choices.
     
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  5. May 10, 2018 at 3:50 AM
    #5
    Stumpjumper

    Stumpjumper New Member

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    4x4 alone would not require it. Towing and heavy off road use might. Can't assume just because 4x4 that it sees dirt
     
  6. May 10, 2018 at 4:23 AM
    #6
    Alloutdrs1

    Alloutdrs1 New Member

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    I have been using redline in my Tacoma and will do so in the Tundra as well. You can also get it in 75w85 like is recommended.
     
  7. May 10, 2018 at 5:19 AM
    #7
    OBXTundra

    OBXTundra Member

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    Redline or Mobil1 only in my Diffs and manual trannies since 2006ish.
     
  8. May 10, 2018 at 5:23 AM
    #8
    mdavis

    mdavis I need a beer.

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    Have AMSOIL in both my diffs.
     
  9. May 10, 2018 at 5:47 AM
    #9
    Oregon 1 Toyo

    Oregon 1 Toyo [OP] New Member

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    Thanks for the help!
     
  10. May 10, 2018 at 8:19 PM
    #10
    geno0506

    geno0506 New Member

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    Not trying to steal this post, I have 12000 on my truck, when do I need to change mine! Also being my first 4x4, do I change front an rear at same time!

    Thanks, back to you OP! :cheers:
     
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  11. May 10, 2018 at 8:34 PM
    #11
    PRO BLANCO

    PRO BLANCO Dirt biking & fishing

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    Agreed. Lucas awesome, Mobile right behind.
    Can’t got wrong with either.
     
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  12. May 10, 2018 at 8:37 PM
    #12
    PRO BLANCO

    PRO BLANCO Dirt biking & fishing

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    Around the 30,000mile mark or 3 years imo.

    Yes, front, rear , and transfer case at same time. That’s what I would do. Just did mine.
     
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  13. May 10, 2018 at 8:39 PM
    #13
    geno0506

    geno0506 New Member

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    Much thanks Brother! :cheers:
     
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  14. May 10, 2018 at 8:41 PM
    #14
    PRO BLANCO

    PRO BLANCO Dirt biking & fishing

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    :cheers::thumbsup:
     
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  15. May 10, 2018 at 8:47 PM
    #15
    15whtrd

    15whtrd Mr. Blonde

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    I used Royal Purple.
     
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  16. May 10, 2018 at 11:17 PM
    #16
    BestGen

    BestGen Free Kyle!

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    I use Redline Synthetic 75W140 in the Tundra(tow rig). I use Redline Synthetic 75W140ns in the rear of my 4Runner with a Spartan locker. It was an improvement over the 75W90 in how the locker operated. I plan on switching it out for their Heavy Shockproof. My friend says it really helped tame the lockers nasty locking/unlocking/banging on the street.

    IMG_2169.jpg
    IMG_2168.jpg
     
    Last edited: May 10, 2018
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  17. May 12, 2018 at 8:43 AM
    #17
    dadose04

    dadose04 New Member

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    Not to high jack the thread, but I thought that the Dealer was the best LSD Gear Oil. Boy was I wrong. But this is what I found out. The dealer told be they use the synthetic 75W-85 TL in all Tundras. So, I spent $36/L for three which is 0.2L short. After the oil change the clutch pads were locked or binding on slow turns.

    Come to find out the new 'TL' is only for '08 forward according Toyota Service Builtin issued in 2008.

    The Owners Manual calls for (Conventional) Hypoid 80W-90 API GL-5.
    Dealer Gave me Syn. Toyota Sym. Gear Oil LT 75W-85 API GL-5
    I went back to my records at 60K and I used Sym. Mobil 1 LS Gear Oil 75W-90
    Castrol has an exact match to the owners spec.

    Would you use the exact match or what worked last time?
     
  18. May 12, 2018 at 9:13 AM
    #18
    Black Wolf

    Black Wolf Where's my popcorn salt? Damnit

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    I'm using Mobil 1 LS Gear Oil 75W-90 in my diffs right now with no issues.
     
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  19. May 12, 2018 at 9:26 AM
    #19
    PRO BLANCO

    PRO BLANCO Dirt biking & fishing

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    Welcome to the best forum!
     
  20. May 14, 2018 at 11:17 AM
    #20
    dadose04

    dadose04 New Member

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    Drained the 'Toyota Limited Slip Differential 75W-85 gear oil TL GL-5' recommended by Dealer because clutch plates were binding and shuddering when turning. Installed 'Castrol 80W-90 (GL-5)', works great now. The Toyota LSD-TL gear oil provided by Dealer is only for 2008 and newer per service bulletin T-SB-0118-08 July 25 2008.
     
  21. Jul 26, 2018 at 7:33 PM
    #21
    15whtrd

    15whtrd Mr. Blonde

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    I bought some 75W-90 M1 Full synthetic but it does not say LS on it. Think that’s OK? Just for my differentials.
     
  22. Jul 26, 2018 at 7:39 PM
    #22
    ColoradoTJ

    ColoradoTJ So there I was.... Staff Member

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    That is fine. You don't have a mechanical Limited Slip differential (unless you installed one).
     
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  23. Jul 26, 2018 at 7:44 PM
    #23
    Js18tundra

    Js18tundra New Member

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    Amsoil severe gear user here!
     
  24. Jul 26, 2018 at 7:49 PM
    #24
    chugs

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    +75k90 for Royal Purple. Drained and filled front/rear diff back in 2013, no issues. I'm due for some new fluids.
     
  25. Jul 26, 2018 at 8:46 PM
    #25
    15whtrd

    15whtrd Mr. Blonde

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    Awesome thanks. Just noticing everyone uses the LS but none of us have limited slip. So I thought maybe there was something about the LS that was better.
     
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  26. Jul 26, 2018 at 8:48 PM
    #26
    15whtrd

    15whtrd Mr. Blonde

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    LOL that’s what I have in mine but I’ve only got about 20,000 on the fluid. Started hearing a few things that it wasn’t that great so decided to switch over to M1.
     
  27. Jul 26, 2018 at 8:51 PM
    #27
    14burrito

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    Please keep in mind Toyota made a mfg change on the t-case. As far as I know, there is not a "like" US gear oil 75w that's "approved" by aftermarket oil mfgs for the 14+ t-case by Borg worner.

    Edit - you mentioned diffs not a 4x4 service overall. Lots of good diff oils out there, I just have the dealership do it because the price I get isn't worth my time to do it.
     
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  28. Jul 27, 2018 at 4:43 AM
    #28
    dadose04

    dadose04 New Member

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    Be advised that the Tundra 'TL' is only for '08 forward according Toyota Service Builtin issued in 2008. The 2004 LSD Owners Manual calls for (Conventional) Hypoid 80W-90 API GL-5. At 60K I tried Sym. Mobil 1 LS Gear Oil 75W-90 and drained it at 70K and it was full of 'glitter'. So at 70k, I switched to Castrol which has an exact match to the owners spec.
     
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  29. Jan 9, 2020 at 5:58 PM
    #29
    Tiamat

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    Did you notice a difference
     
  30. Jan 9, 2020 at 6:35 PM
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    Doxiedad

    Doxiedad New Member

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    Doesn't the Mobil 1 75w90 LS also meet API GL-5? According to their website it does.
     

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