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Rear Differential Leaking on my 3rd gen 2018 Tundra same as my 2017 Tacoma

Discussion in '3rd Gen Tundras (2014+)' started by OR18TRD, Jun 28, 2019.

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Year/leak/no leak

  1. 2007-2013 leak

    0 vote(s)
    0.0%
  2. 2007-2013 no leak

    1 vote(s)
    5.0%
  3. 2014/15 leak

    0 vote(s)
    0.0%
  4. 2014/15 no leak

    1 vote(s)
    5.0%
  5. 2016/17 leak

    2 vote(s)
    10.0%
  6. 2016/17 no leak

    2 vote(s)
    10.0%
  7. 2018 leak

    9 vote(s)
    45.0%
  8. 2018 no leak

    3 vote(s)
    15.0%
  9. 2019 leak

    2 vote(s)
    10.0%
  10. 2019 no leak

    0 vote(s)
    0.0%
  11. Leaked and was fixed

    1 vote(s)
    5.0%
  12. Leaking was not fixed told to keep an eye on it.

    3 vote(s)
    15.0%
  13. Leaked and was retorqued

    1 vote(s)
    5.0%
  14. Miles when leak started 0-2500

    0 vote(s)
    0.0%
  15. 2501-5000

    0 vote(s)
    0.0%
  16. 5001-7500

    0 vote(s)
    0.0%
  17. 7501-10000

    3 vote(s)
    15.0%
  18. 10000-15000

    5 vote(s)
    25.0%
  19. 15000+

    0 vote(s)
    0.0%
Multiple votes are allowed.
  1. Aug 9, 2019 at 2:13 PM
    #331
    av8tor

    av8tor New Member

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    2016 Platinum here with ~ 20,600 miles, leakage has been found... Gonna clean and confirm torque to see if it starts again.
     
  2. Aug 9, 2019 at 2:56 PM
    #332
    Shaggie13

    Shaggie13 New Member

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    Had an appointment for oil change at dealership and happened to check this thread before I went and noticed some leakage. Had them look and it and they did the same thing. Replaced the rear differential gasket all under warranty. I have a 2017 TRD Pro with 20K miles.
     
  3. Aug 10, 2019 at 8:54 AM
    #333
    av8tor

    av8tor New Member

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    I wonder if this has anything to do with using the S shift mode in that it is creating higher temps/pressures in the rear end instead of using D mode? Maybe the breather needs to be different to compensate for this...

    I’ve been using S shift mode more often over the last few months (because I like hearing my BAM exhaust :headbang:) and just noticed the seepage after reading this. It wasn’t there prior to the install and I rarely used S shift mode prior.

    Any seepage happening from ya’ll that normally uses D shift mode?

    Also, is there a performance breather that can take the place of the factory one in the diff? May try this after cleaning the diff to see if it helps. No engineer here, just trying to think like one. Unless someone knows my thinking is off.
     
    Last edited: Aug 10, 2019
  4. Aug 10, 2019 at 10:15 AM
    #334
    Shaggie13

    Shaggie13 New Member

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    I never used the S shift mode. The way the just replaced it at my dealership with no fuss makes me think this is a known item that they are seeing a lot more now.
     
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  5. Aug 10, 2019 at 10:39 AM
    #335
    15whtrd

    15whtrd Mr. Blonde

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    Your rear end isn’t spinning any differently or at a different RPM using S mode. Only difference I could see would maybe be deceleration. They do make better breathers out there like ARB. I relocated my stock breather up behind my drivers tail light. I also use S mode quite often and my rear end seems to be dry. About 29,000 miles. But I also off road and I’m in the dust somewhat often. Then I hose down the bottom of the truck. So I just might not be noticing anything.
     
    GNTundra likes this.
  6. Aug 10, 2019 at 10:44 AM
    #336
    av8tor

    av8tor New Member

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    My theory debunked maybe. No engineer by any means. Lol
     
  7. Aug 10, 2019 at 10:46 AM
    #337
    av8tor

    av8tor New Member

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    I know that the rpm’s might be held higher for longer and using it to decelerate I was thinking these could maybe create higher pressures to cause it. Theory most likely debunked. No engineer by any means. Lol
     
    15whtrd likes this.
  8. Aug 10, 2019 at 11:30 AM
    #338
    15whtrd

    15whtrd Mr. Blonde

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    Anything is possible. I’ve come to realize that the stock breather does hold a bit of pressure before releasing. I’m sure it’s possible with the newer oils being synthetic that it could find its way past the seals. Maybe that slight amount of pressure could expose a poorly sealed rear end.
     
  9. Aug 10, 2019 at 2:08 PM
    #339
    Boosted4runner

    Boosted4runner Join the NRA please.

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    Duuuuuude! You have some bad luck!
    I’m sorry, that’s not how it’s supposed to be when buying a Yota :(
     
    Zoomworms and OR18TRD [OP] like this.
  10. Aug 10, 2019 at 3:10 PM
    #340
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

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    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats 6 3/4” antenna Coverking leather rear seat cover
    What do you think about an open breather?
     
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  11. Aug 10, 2019 at 3:12 PM
    #341
    OR18TRD

    OR18TRD [OP] Pândâ Crëw

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    Suspension: front- Bilsein 6112 set at 1.9”; Rear- bilstein 5160 with maxtrac 1” shackel. Wheels: Method MR308 roost wheels 18x9” +18 offset. Tires: 275/70/18 Goodyear wrangler DuraTrac’s Removed front mudflaps and moved front wheel well liner forward. Bakflip MX4 Tonneau cover Line-x premium bed liner aFe CAI Rear differential breather moved behind taillight Debadged Windows tinted 20% ESP locking long box rear seat storage OEM all weather mats 6 3/4” antenna Coverking leather rear seat cover
    Thanks. Agreed.
     
    Boosted4runner likes this.
  12. Aug 10, 2019 at 3:58 PM
    #342
    15whtrd

    15whtrd Mr. Blonde

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    I think that’s what the ARB is. Flows in both directions. That’s what I would like to do
     
    OR18TRD [OP] likes this.
  13. Aug 10, 2019 at 5:16 PM
    #343
    phabej

    phabej New Member

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    Lol reminds me of how transmedic in Gresham does things, but those guys (Corey) warranty their work.
     
    OR18TRD [OP] likes this.
  14. Aug 10, 2019 at 6:55 PM
    #344
    Watt maker

    Watt maker Keepin' the lights on!

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    I don’t think so. I use “S” quite often and there’s no leaks on mine.
     
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  15. Aug 10, 2019 at 6:58 PM
    #345
    Watt maker

    Watt maker Keepin' the lights on!

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    It does keep a slight positive pressure in the diff but I see it as a good thing, it should help keep out water and dust.
     
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  16. Aug 10, 2019 at 11:00 PM
    #346
    Boosted4runner

    Boosted4runner Join the NRA please.

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    I didn’t read through the 15 pages of this thread, but is the consensus that the machined face of the axle tube/pumpkin where the 3rd bolts up isn’t flush/symmetric?
    I find that extremely hard to believe....but if a correctly applied bead of RTV isn’t working, it might be the case.

    Eta - has anyone yanked their own 3rd and RTV’d themselves to see if it wasn’t a 20yr old Monday morning Toy tech service failure?
     
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  17. Aug 10, 2019 at 11:06 PM
    #347
    Boosted4runner

    Boosted4runner Join the NRA please.

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    In my opinion, the RTV/seal should be able to withstand waaaaaaay higher pressures than any type of breather.
    Even if the breather was clogged, the breather-to-tube connection should blow off the clamp before RTV giving way around the 3rd.

    If there was any type of significant/harsh driveline force (supercharger, 12” lift with severe driveline angle that wasn’t corrected properly)....might make more sense.
    But not stock. Weird.
     
    Last edited: Aug 10, 2019
    OR18TRD [OP], Watt maker and 15whtrd like this.
  18. Aug 12, 2019 at 6:55 PM
    #348
    phabej

    phabej New Member

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    Crap. Just checked and it's leaking! This sucks balls.. I'm taking the truck in tomorrow to get my free oil change Toyota care maintenance so I'll ask them to look. I'm sure they'll just reseal it. 10k miles only. And I thought my old Chevy was bad. I guess not that far apart now.

    :mad:

    IMG_20190812_184926.jpg
    IMG_20190812_184900.jpg
     
    OR18TRD [OP] and SiberianTundra like this.
  19. Aug 12, 2019 at 7:36 PM
    #349
    SiberianTundra

    SiberianTundra New Member

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    I wonder if region has anything to do with it. Like salt and such.
     
  20. Aug 12, 2019 at 8:26 PM
    #350
    phabej

    phabej New Member

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    No salt here. Panda and I are in Portland area. Just rain water
     
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  21. Aug 12, 2019 at 8:39 PM
    #351
    SiberianTundra

    SiberianTundra New Member

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    I am at around 5300 miles and dry as I posted before. But we will see after 10k
     
    OR18TRD [OP] likes this.
  22. Aug 13, 2019 at 2:54 AM
    #352
    ZPMAN

    ZPMAN 2nd place is the 1st looser

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    Has anyone noticed that it is all trucks with about 10 to 20 thousand miles and brand new?
     
  23. Aug 13, 2019 at 3:57 AM
    #353
    preacher35

    preacher35 New Member

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    Yes, I'm noticing a trend. And my 2018 has 10k on the clock and, of course, the same diff oil seepage. Not worried about it though. My neighbor just purchased a 2019 and we are keeping an eye on his for the same issue.
     
    OR18TRD [OP] likes this.
  24. Aug 13, 2019 at 5:40 AM
    #354
    phabej

    phabej New Member

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    It's not about the worrying as it should never be doing this at 10k, maybe at 80-90k.
     
    OR18TRD [OP] likes this.
  25. Aug 13, 2019 at 3:34 PM
    #355
    phabej

    phabej New Member

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    Ok stealership said no fix, as it's not actively leaking, a seep is a slow leak it's it not. I said bs. No new truck on the lot does that and not at 10k. So no option on fixing this seeping except to call Toyota and see what kind of bs they have to say about it.
     
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  26. Aug 13, 2019 at 3:54 PM
    #356
    Moon Puppy

    Moon Puppy New Member

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    It amazes me the inconsistency between dealer services.
     
  27. Aug 13, 2019 at 3:56 PM
    #357
    phabej

    phabej New Member

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    I will call another Toyota dealership. The ones in the lot are spotless! Such bs it maybe a different service advisor.

    I hate to have to drive 30+ miles to get it looked at somewhere else.
     
    OR18TRD [OP] likes this.
  28. Aug 13, 2019 at 3:59 PM
    #358
    Shaggie13

    Shaggie13 New Member

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    Yeah. That is BS. Like I said my dealership here looked at it and ordered a new gasket no questions asked, all under warranty. I have 20K miles.
     
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  29. Aug 13, 2019 at 5:03 PM
    #359
    phabej

    phabej New Member

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    I called Toyota of America. Got a case number, manager will call me tomorrow and we will go from there. They asked for dealership and service advisor name.
     
  30. Aug 13, 2019 at 7:43 PM
    #360
    preacher35

    preacher35 New Member

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    No, I'm not going to worry about it. I am certainly not going to get angry about it, as it seems that you are. This is my second Toyota (first was a 4Runner that went to 180k with no issues other than A/C evap coil), and so far I have been EXTREMELY pleased with them. So, one day, when I need to take it in for something ancillary, I will have them nip this problem in the bud. No big deal.
     
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