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Help! 2016 OR rear diff fluid change

Discussion in '3rd Gen. Tacomas (2016+)' started by Neodous, Oct 21, 2019.

  1. Oct 21, 2019 at 7:40 AM
    #1
    Neodous

    Neodous [OP] Well-Known Member

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    Ok so I have been looking all over the forum for this and can't seem to find anything. So I used this in my rear diff: https://www.redlineoil.com/75w90-gl-5-gear-oil, says its for LS diffs. But I don't see anyone using this stuff from Red Line in there diffs. Only reason I used it is because I trust Red line and there recommended fluid. Can someone let me know if this is the right stuff???
     
  2. Oct 21, 2019 at 7:43 AM
    #2
    shakerhood

    shakerhood Well-Known Member

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    I believe the Owners Manual calls for 75W-85 but sure you can put something else in.
     
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  3. Oct 21, 2019 at 7:46 AM
    #3
    Neodous

    Neodous [OP] Well-Known Member

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    Yes I have seen ppl using 75w90 and not the 75w85 because it cost a good bit more. I am more interested in the additional friction modifiers that this has.
     
  4. Oct 21, 2019 at 7:53 AM
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    shakerhood

    shakerhood Well-Known Member

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    We don't have mechanical limited slip so I can't imagine friction modifiers being necessary
     
  5. Oct 21, 2019 at 7:58 AM
    #5
    Neodous

    Neodous [OP] Well-Known Member

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    Great so I wasted $60 filling this up with this Red line fluid, unless there in no harm in leaving it in.
     
  6. Oct 21, 2019 at 8:00 AM
    #6
    Grossomotto

    Grossomotto Complete 3rd Member

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    You’re totally fine with that, RL even makes a 75W85, but it’s not needed.

    The dealer will even put in 75W90 bulk gear oil.

     
  7. Oct 21, 2019 at 8:01 AM
    #7
    WickedAx

    WickedAx Active Member

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    Redline's product page (screenshot below) lists the Toyota 08885-81006 oil (Toyota's 75w-85 GL-5 differential gear oil) under the OEM compatibility tab. I just changed the oil in my 2018 OR MT's front and rear diffs with this exact oil.

    upload_2019-10-21_10-59-29.jpg

    OP, one other quick note - if you're looking to change the transfer case oil, I'd recommend the Ravenol J1C1003 SAE 75W MTF-3 fluid, which can be had over at Amazon for ~$20/liter.

    https://www.amazon.com/dp/B00QPCL7ZE/ref=cm_sw_em_r_mt_dp_U_KMCRDb8PJV0K0

    Ravenol's product page lists the Toyota 75W gear oil under the OEM compatibility tab.
     
    Last edited: Oct 21, 2019
    mcharfauros and tonered like this.
  8. Oct 21, 2019 at 8:02 AM
    #8
    tonered

    tonered tacorider

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    I don't know specifically about the e-locker and the friction modifiers, but 75w90 is no big deal. I used M1 75w90 and ECGS recommends 75w140.

    In my mind, the LS stuff might be a good thing for the locker dog gear, but that is just shooting from the hip.
     
  9. Oct 21, 2019 at 8:05 AM
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    MFTAF13

    MFTAF13 Well-Known Member

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    You're fine. I just changed the oil in my front & rear diffs and t-case with the same stuff.
     
    Last edited: Oct 21, 2019
  10. Oct 21, 2019 at 8:06 AM
    #10
    Neodous

    Neodous [OP] Well-Known Member

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    Thanks, I cant see why they say to use friction modifiers if we don't need them.
     
  11. Oct 21, 2019 at 8:06 AM
    #11
    Neodous

    Neodous [OP] Well-Known Member

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    With the friction modifiers?
     
  12. Oct 21, 2019 at 8:06 AM
    #12
    tonered

    tonered tacorider

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    Just of future folks reading this, the 3rd Gen T case requires different lube than multi-viscosity GL5.
     
  13. Oct 21, 2019 at 8:07 AM
    #13
    Grossomotto

    Grossomotto Complete 3rd Member

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    Also, RedLine is the highest grade Group V poly ester based synthetic fluid, very few others are, only perhaps Motul.

    RL gear fluids are extremely popular. Check out the BITOG site, owners will put the RL gear oil in as a lifetime fill.


     
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  14. Oct 21, 2019 at 8:08 AM
    #14
    tonered

    tonered tacorider

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    Because limits slip diffs, like Torsens, have meshing worm gears. Friction modifiers will prolong the life or might be a factory requirement.
     
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  15. Oct 21, 2019 at 8:10 AM
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    shakerhood

    shakerhood Well-Known Member

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    Our Tacoma's have computer simulated LSD.
     
  16. Oct 21, 2019 at 8:12 AM
    #16
    Neodous

    Neodous [OP] Well-Known Member

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    Ok so they are in there I am just don't need them, I don't want to cause damage to anything.
     
  17. Oct 21, 2019 at 8:15 AM
    #17
    MFTAF13

    MFTAF13 Well-Known Member

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    Good point. I'm 2nd gen. User is responsible for doing their homework.
     
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  18. Oct 21, 2019 at 8:17 AM
    #18
    tonered

    tonered tacorider

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    Generally, the only worry with friction modifiers is in applications that use clutch packs, like wet clutch motorcycles, certain LSD types, and some AWD center diffs. I used oil with friction modifiers once on my bike with a wet clutch and had no issues.

    If Redline says that it applies to your OR with the e-Locker then you are good to go. If you are still worried, there is a contact form on their website. I pinged them once about a suspected T case fluid for the Taco and they replied within a half hour. Good folks.
     
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  19. Oct 21, 2019 at 8:20 AM
    #19
    tonered

    tonered tacorider

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    Very true, but some can be lead astray really easily. It also doesn't help that some are saying that dealers are dropping GL5 in there. We'll see what happens long term, but for now there is only $70/liter Toyota 75w LF and $17/liter Ravenol out there.
     
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  20. Oct 21, 2019 at 8:23 AM
    #20
    shakerhood

    shakerhood Well-Known Member

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    Our truck have an open diff and the brakes are actuated to simulate limited slip.
     
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