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Leaky rear seal?

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

  1. Jun 27, 2020 at 10:54 AM
    #31
    sunnysideTRD

    sunnysideTRD New Member

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    Well fellow members. Its been less than a year after having the reseal at the dealership and I find new leaks. At first it started at the bottom bolts and now I can see two upper bolts now have leaks. Will be taking it to the dealership this week. SMH
     
  2. Jun 27, 2020 at 11:16 AM
    #32
    phabej

    phabej New Member

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    At least you got yours resealed. I didn't get Jack
     
  3. Jun 27, 2020 at 11:25 AM
    #33
    sunnysideTRD

    sunnysideTRD New Member

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    That sucks. I dont know which dealership you went to but the Dallas Toyota at 635 sealed it when I brought it in for scheduled maintainence. They called Toyota and got authorization.
     
  4. Jun 27, 2020 at 11:38 AM
    #34
    tttrdpro

    tttrdpro Machine Whisperer

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    I really don’t see what all the fuss is about. All the pictures I’ve seen have been very, very, very, very, minor leaks. If you’re anal enough to get all worked up about it, trade your Tundra in on an F-150 and crawl under it after 12-15k. Then you’ll see some leaks that warrant serious concern.
     
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  5. Jun 27, 2020 at 1:33 PM
    #35
    TTund16

    TTund16 New Member

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    Torquing won't fix the minor seepage ... There was a long thread about this.

    curious why the mods can't just block the banned member and why the entire informative thread (i assume started by that member) has to disappear. @ColoradoTJ may know the answer. I think he knows more that just towing :D

     
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  6. Jun 27, 2020 at 1:41 PM
    #36
    sunnysideTRD

    sunnysideTRD New Member

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    I cant say for others but mine happened at 6000 miles in the first year and it was 3/4 of the entire casing around. To each his own but I bought a Toyota to avoid these and it being their top tier offroad, I expect quality. So this is my second incident and I only have just over 15000 on it. No way should it leak in less than a year. But I agree about other brands, hell im dealing with a bmw 550 with a transmission fluid leak as you are reading. having a bmw problems is like a toothache, slow small pains then bam! You need to see a dentist. Anyways, good luck to all. Also, having it noted in Toyota's maintainence records is a good way to come back to them if things do get bad in the future, which I hope to avoid my remaining years of ownership.
     
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  7. Jun 27, 2020 at 1:42 PM
    #37
    sunnysideTRD

    sunnysideTRD New Member

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    Yes, I remember and I originally posted on same topic there as well.
     
  8. Jun 27, 2020 at 3:07 PM
    #38
    Elduder

    Elduder New Member

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    Have had 2 Tacomas, happened on both even though the 2nd one was after they did a full recall on the rear diffs leaking. Took it to Toyota and it was addressed. Three months later its back. Toyota techs have addressed this issue so many times they consider it normal. Torque checks and seal replacements do not resolve the issue.

    As a mechanic myself I look at it this way:

    There's no way a diff seal could be replaced multiple times and still leak if it were the seal alone. Mind you this is conjecture, my theory from shit I've seen working with high vacuum tools that operate at pressures less than 1/800 of our normal atmosphere. If it still leaked it's likely that the diff housing itself is porous or scored and allows some seepage, if Toyota replaces the diff it will eventually do the same thing. I've look at other Tacomas and I've seen so many of them doing this, 2nd gens too.

    Ultimately though its of little concern. The diff houses enough fluid that this seepage, that usually never forms an accumulated drip leak, wont be an issue for anyone that follows planned maintenance. So you can either try and likely waste your time chasing the issue with Toyota, or relax and keep an eye on it. Once you start seeing it in your driveway, then address it.
     
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  9. Jun 27, 2020 at 3:27 PM
    #39
    phabej

    phabej New Member

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    It's a big deal on a brand new vehicle, don't you agree? Don't fix your toilet or sink when it starts seeping okay? Lol
     
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  10. Jun 27, 2020 at 4:51 PM
    #40
    Elduder

    Elduder New Member

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    If only engineering were always so easy. A truck is not a toilet, at least for most :D. Jeeps still have death wobble, as do F250s. Tacomas still have issues with the driver side CV bushing failing over and over, driveline vibrations, failing leafs, as well as many other documented issues. Subarus still have head gasket issues and eat oil on the norm. Its not an abnormal issue to see things go entire life spans of a vehicle or cross generations without ever being solved. It is unfortunate though. I havent seen anyone have a catastrophic failure directly related to this seeping though. At least ours is only seeping, aside from the seepage on my Tacoma it also howled like crazy. I would get fatigued by listening to it with the rear slider open. This issue though is almost always just seepage, its not even enough to form a drip.

    If anyone ever does find a vehicle or machine for that matter that never fails let me know, I will need to dispose of it promptly or risk losing my job.
     
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  11. Jun 27, 2020 at 5:05 PM
    #41
    phabej

    phabej New Member

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    I'm not sure you understand our point here. Why is it so difficult for people to accept bad quality exits with Toyota as well.

    It's a brand new vehicle, at least let it pass the 36k or 60k before this happens. Engineering is hard that's why they get paid a lot to be engineers and why the truck cost more than a Corolla.

    If it truly is just 1% of the trucks that leak,seep whatever excuse they wanna call it, just fix the damn thing. What good is a factory warranty if these issues come up, it wasn't our fault.

    If you wait for it to fail then it's too late.

    Besides Toyota supposed to have the best quality?? LMAO sure right...
     
  12. Jun 27, 2020 at 5:15 PM
    #42
    Elduder

    Elduder New Member

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    FWIW the truck cost more than a Corolla largely and mostly due to material cost and time cost for manufacturing a larger vehicle. Quality is an ideal or a target, not a tangible thing.

    I understand it, but I also understand the realities that keep me employed. We all want things that work perfectly, hence my capacity to agree with your sentiment on wishing it never occurred. Do you think I was excusing that this occurred on my last two Toyotas?

    Conversely, I understand that while there are ways to fix the issue for good, Toyota will likely not spend the money and time for R/D, line stoppage or part shorting, to fix it. They evaluate the risk and the cost of the issue as it is expressing itself. The seepage must not be progressive enough to cause complete failure on enough vehicles to warrant the cost of truly fixing it.

    You may have misunderstood me, or perhaps I need to be more clear, I do agree with you. I'm just open minded since I work with this shit daily, and I was expressing both the other side of the situation and my opinion that while it is frustrating, its not something anyone should lose sleep or start an argument with Toyota over. Its a fools errand. If them re-torquing or sealing it helps you then by all means do it, just promise me you'll never look under the truck again, like I did. It will reoccur, its just a matter of time.
     
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  13. Jun 27, 2020 at 5:21 PM
    #43
    Elduder

    Elduder New Member

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    Ill also respond to the edited post after my last post.

    I'm not trying to argue here, just help, maybe give some peace of mind.

    I can tell you with complete certainty that if the issue remains the seepage that you see, it will not lead to failure provided you follow the recommended maintenance intervals. Now if you were to say not change or check the oil after 200k+ miles and it failed, please dont blame the seeping.

    There are countless Tacomas with this issue, as well as some Tundras with hundreds of thousands of miles on them, on the original diff.
     
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  14. Jun 27, 2020 at 5:26 PM
    #44
    SuperWhite20

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    In the automotive world it’s called seepage and more than likely your dealer won’t touch it unless it’s leaking.
     
  15. Jun 27, 2020 at 5:28 PM
    #45
    Elduder

    Elduder New Member

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  16. Jun 27, 2020 at 6:17 PM
    #46
    tttrdpro

    tttrdpro Machine Whisperer

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    Toyota does have the best QDR in the business. That doesn’t mean they don’t have any issues at all. It’s hilarious the way some folks obsess over an issue that 99.99% of the time will cause no failure. “ My rear diff seeps at less than 50k so Toyota reliability is a myth.” ROTMFFLMAO!!!
     
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  17. Jun 28, 2020 at 6:41 AM
    #47
    Dano8855

    Dano8855 New Member

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    I took mine in at 14k miles and the dif was seeping all around. The dealership said they have seen a lot of 2018s with this issue. They replaced the gasket and its still dry at 26k. I hope it stays that way.
     
  18. Jun 28, 2020 at 8:09 AM
    #48
    Fearthisbeard

    Fearthisbeard New Member

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    My Tacoma also had this happen, there are big threads on it over on tacomaworld , my dealer replaced the seal and that seemed to fix it for awhile, but some people had repeated issues with it. But I never came across anyone who had any damage associated with it.
     
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  19. Jun 28, 2020 at 12:21 PM
    #49
    socaltundra951

    socaltundra951 Gentlemen Prefer Black Tundras

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    Well...I wouldn't go so far as to say this issue is "normal", but it doesn't seem to have any effect on the truck. Mine has had the exact same look as OP ever since I've had the truck and it's never once dripped.

    I had the differential fluid serviced at 60k recently and the mechanic (who I do trust, he's always been upfront and honest) said that the fluid level was right where it should be.
     
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  20. Jun 28, 2020 at 6:49 PM
    #50
    Elduder

    Elduder New Member

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    Thanks, posts like this help with establishing an understanding of how serious is is or isn't.
     
  21. Jun 28, 2020 at 7:00 PM
    #51
    ninjajay

    ninjajay Posting from the toilet

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    The amount of fluid lost from this seepage likely would not become material until well past the useful life of the fluid itself. My 18 has had it since new and my last diff fluid change the amount that came out was about the amount that’s supposed to be in there.
     
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  22. Jun 28, 2020 at 7:01 PM
    #52
    Elduder

    Elduder New Member

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    Yeah thats why I mentioned that if anyone follows the routine maintenance it shouldnt be a concern unless it leaves residue on the ground.
     
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