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Leaky rear seal?

Discussion in '3rd Gen Tundras (2014+)' started by Jc75754, Jun 6, 2020.

  1. Jun 6, 2020 at 3:22 PM
    #1
    Jc75754

    Jc75754 [OP] New Member

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    Is it just me or does this look like it’s seeping oil out?
     
  2. Jun 6, 2020 at 3:24 PM
    #2
    Jc75754

    Jc75754 [OP] New Member

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    Pic of rear seal

    560E2A6B-4504-4E62-B082-8B010524D4C8.jpg
     
  3. Jun 6, 2020 at 10:51 PM
    #3
    Kanobi13

    Kanobi13 New Member

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    That glare is terrible better pics...
     
  4. Jun 7, 2020 at 12:03 AM
    #4
    Big_Ed

    Big_Ed New Member

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    I am not a mechanic, but that little bit of stain would not cause me any concern at all.
     
  5. Jun 7, 2020 at 1:23 AM
    #5
    JimboSlice413

    JimboSlice413 New Member

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    A lot of Tundras are wet around that seal. If its under warranty you can get it fixed. If not, its not really a leak so I wouldn't worry about it
     
  6. Jun 7, 2020 at 3:16 AM
    #6
    tttrdpro

    tttrdpro Machine Whisperer

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    Your truck is obviously defective. You should get rid of it immediately and buy a Ford.
     
    stuckinohio likes this.
  7. Jun 7, 2020 at 4:02 AM
    #7
    Jc75754

    Jc75754 [OP] New Member

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    I’ll get a better pic and thanks for all the replies.
     
  8. Jun 7, 2020 at 4:04 AM
    #8
    Ted4311

    Ted4311 Don't Sweat The Small Stuff

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    Hahahaha :rofl:

    Buying a Ford he would dream of this slight/non issue
     
    Black Wolf and tttrdpro like this.
  9. Jun 7, 2020 at 4:06 AM
    #9
    Ted4311

    Ted4311 Don't Sweat The Small Stuff

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    If it were me and trust me I know my limits. A seal of this nature I would attack myself.

    Good reason for some alone time with your truck and a couple of beer ;)
     
  10. Jun 7, 2020 at 4:14 AM
    #10
    timsp8

    timsp8 Member

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    There was a big thread about this around 6 months ago. But the OP was banned and the thread is now gone. It seems like a lot of people had this seepage. Some were saying it’s ok and some were saying it’s the end of the world.

    Toyota replaced my diff with an LSD around 10k and I don’t have any seepage with 27k miles now. Not sure if I never had it or did but didn’t notice and then resealing it fixed it.

    From that thread, if you go in to get it fixed under warranty most Toyota places will just tighten the bolts and say check it after so many miles.
     
    TTund16 and Ted4311 like this.
  11. Jun 7, 2020 at 5:12 AM
    #11
    Jc75754

    Jc75754 [OP] New Member

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    So tightening the bolts was successful? I’m not very technical but capable of small stuff. Most technical job I have done is brake job.
     
  12. Jun 7, 2020 at 5:14 AM
    #12
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    Lubricant leaks are only a problem when (1) the lubricant volume is diminished to the point where the available lubricant no longer lubricates adequately, i.e. is no longer reducing sliding contact friction between parts, or (2) when the amount of lubricant being leaked causes the owner annoyance at the mess being made in the parking area and on the vehicle itself.

    Neither of those conditions apply in your case: Your rear axle lube appears to be sliding under the carrier sealing material one molecule at a time. :D
     
    Last edited: Jun 7, 2020
  13. Jun 7, 2020 at 5:17 AM
    #13
    Jc75754

    Jc75754 [OP] New Member

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    Little better pics

    B6526610-29A7-489C-9599-251C34F376C3.jpg
    68A5A9AC-89FA-4E91-BF88-D4EBF91590F3.jpg
     
    BTBAKER likes this.
  14. Jun 7, 2020 at 5:18 AM
    #14
    Jc75754

    Jc75754 [OP] New Member

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    I might be paranoid. We travel with a camper long distances and I like to try an prevent issues as best I can.
     
  15. Jun 7, 2020 at 5:38 AM
    #15
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    I understand your concern.

    I owned a First Gen Toyota 4Runner for 30+ years. It had oil seep traces exactly like that. They appeared, but never worsened to "wetness" during my entire ownership. Frankly, I will be surprised if torqueing the nuts has any effect, but it's worth a try. (Specified torque for the ten carrier nuts is 53 ft-lbf.) Toyota techs know that, but they also know it's not a serious problem, and they go through the motions.

    IF the condition worsens, and I doubt that it will, it will very slowly progress to wetness, then a very slow drip as the wetness accumulates. This will not happen in a thousand miles, more like tens of thousands of miles. You could make a dozen camping trips before an lube leak will grow that much. You'll see drips on your driveway long before you've lost enough lube to seriously reduce lubrication of the rear axle gears.
     
    Jc75754 [OP] likes this.
  16. Jun 7, 2020 at 5:42 AM
    #16
    Jc75754

    Jc75754 [OP] New Member

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    I hear what you're saying about getting a Ford. This truck took us from NC to Utah, across Wolf creek Pass in Colorado (10,000 foot) and back all with a 7,500 lb camper. Can’t express how happy I am with it, we passed countless other trucks on the side of the road of all brands except tundras.
     
    Black Wolf likes this.
  17. Jun 7, 2020 at 5:43 AM
    #17
    Jc75754

    Jc75754 [OP] New Member

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    I really appreciate that info. I can always count on this forum for good advice.
     
    JohnLakeman likes this.
  18. Jun 7, 2020 at 7:37 AM
    #18
    Kanobi13

    Kanobi13 New Member

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    Give it a good cleaning and keep an eye on it.
     
  19. Jun 7, 2020 at 8:29 AM
    #19
    TundraGuy66

    TundraGuy66 New Member

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    And by getting rid of it immediately he means to sell it to me at a very reduced price!:rofl:
     
    tttrdpro likes this.
  20. Jun 7, 2020 at 8:48 AM
    #20
    stuckinohio

    stuckinohio MGM Crue

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    One recommendation i would suggest is check rear diff fluid level. If low-fill / If High-drain. (it looks like some seeped out the vent).
    I would not be shy to change the fluid during this inspection.
    New trucks come with new gears, and while they are "broke in" per say from factory, there are still micro metal shavings created as parts mesh together.
    The fluid change is more to remove metal particulates from oil that were creating as the parts mesh. I change the fluids early at the first interval, then follow Toyota's recommendations after.
    If you own a torque wrench, I would double check and re-torque in a star pattern to spec. (Although i don't know that value off the top of my head)
    This recommendation is not a need or requirement, but may help give you some piece of mind.
    Continue to monitor and if problem persists get Toyota involved.
     
  21. Jun 7, 2020 at 9:41 AM
    #21
    phabej

    phabej New Member

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    Yep same shit on my truck

    BS I called Toyota of America and locally and a master tech told me that's normal. They won't fix it or even look at it, not even to clean it off.

    I thought Toyota had the best quality control in the business. Lol my ass .

    Screenshot_20200520-194522.jpg
     
    georgiey22 likes this.
  22. Jun 7, 2020 at 12:02 PM
    #22
    JimboSlice413

    JimboSlice413 New Member

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    It sucks when you know it's there but it will never cause an issue for the life of the vehicle. There's a thread on this somewhere. Your warranty covers failed gaskets and seals, call Toyota corporate if you're not happy, they're very responsive to warranty issues. My dealer resealed mine, no reason yours shouldn't do the same.
     
  23. Jun 7, 2020 at 1:12 PM
    #23
    Jc75754

    Jc75754 [OP] New Member

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    Just out of curiosity seems like there is some disagreement on the oil. I have used 75w85 in the past but others said 75w or 75w90. Any more guidance would be appreciated.
     
  24. Jun 7, 2020 at 2:29 PM
    #24
    phabej

    phabej New Member

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    I called them, they said it's normal. Seriously, the local dealership didn't do any better either. The truck has 11k when it started, now it's at 17k. Still over 1yr factory warranty left. I don't want to drive around to multiple dealership just to see who will fix it under warranty.

    This is a defect, whether it's not torque enough, bad seal, or whatever. It's still a defect.
     
  25. Jun 7, 2020 at 3:16 PM
    #25
    chugs

    chugs New Member

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    Mix it 50/50, concerns resolved lol jk
     
  26. Jun 7, 2020 at 3:16 PM
    #26
    JohnLakeman

    JohnLakeman Burning Internet Daylight

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    You've probably misunderstood why some are saying 75W90. I believe it has more to do with what brand gear oil they want to use.

    Your Gen3 owner manual probably specifies "Toyota Genuine Differential Gear Oil LT 75W-85". But...owners have favorites that they want to use because they can get their brand cheaper, or more easily, or because it's synthetic, e.g. Mobil1 Syn Gear Lube LS 75W-90. Now, OCD owners have a dilemma: Toyota specifies 75W-85, but Mobil1 only comes in 75W-90! Are you going to pay dealer prices for the exact Toyota spec?...Or...Buy Mobil1 synthetic and worry about the slight difference in viscosity spec?

    Answer: I would buy either with confidence according to my preference. Conventional gear oils were previously not multi-vis oils, they were only single weight, like 90W. As lubricants have transitioned to synthetic and synthetic blends, it has become economically feasible to provide multi-vis gear oils. The difference in 75W-85 and 75W-90 is negligible. Both the Toyota TGDGOLT and Mobil1 Syn Gear Lube meet API GL-5 specification.
     
    YardBird likes this.
  27. Jun 7, 2020 at 5:21 PM
    #27
    Jc75754

    Jc75754 [OP] New Member

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    That makes a bit more sense
     
  28. Jun 8, 2020 at 6:08 AM
    #28
    blanchard7684

    blanchard7684 New Member

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    I have same thing on my '19 TRD Pro. Doesn't keep me up at night but it is a bit weird and slightly disappointing. Reason being is that I have had 4 5th gen 4 runners and never ever saw that kind of seepage pattern.

    The pattern suggests to me it may not really be a leak. It could have been some left over lube during assembly that wasn't cleaned off.
     
  29. Jun 8, 2020 at 8:00 AM
    #29
    phabej

    phabej New Member

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    probably cause Tundra is assembled in the USA on a Friday! While the other you had were built, assembled and shipped from Japan. Yep, Wikipedia says "All 4Runners have been built at Toyota's Tahara plant at Tahara, Aichi, Japan, or at Hino Motors' Hamura, Japan plant".
     
  30. Jun 8, 2020 at 12:48 PM
    #30
    Jc75754

    Jc75754 [OP] New Member

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    When I bought the truck there wasn’t any seeping that I am aware of because I repainted the whole undercarriage. Seriously it’s like I am an old man yelling at clouds constantly, “things aren’t made like used to be!” Only 33btw
     

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