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Trasmission/main seal leak?

Discussion in '3rd Gen. Tacomas (2016-2023)' started by TRD_0ffRd2017, Feb 24, 2025.

  1. Feb 24, 2025 at 12:49 PM
    #1
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Looking to see if anyone has seen this on their tacos? When I wiped it off, the oil did not appear red.
    additionally, there is no puddle of oil in the driveway to report, just noticed it today. Any advice or Next steps?

    IMG_1658.jpg
    IMG_1667.jpg
     
  2. Feb 24, 2025 at 12:54 PM
    #2
    airforceb2cc

    airforceb2cc Well-Known Member

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    Looks like rear main seal. Not common but not uncommon. Usually shows up around 175k. Local shop should be able to drop the tranny and replace it for about $1000-1500 depending on demographics. If you are mechanically inclined, it can be done in a weekend with a pony keg and a friend.
     
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  3. Feb 24, 2025 at 12:56 PM
    #3
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Darn, just my luck. Is this something that can be babied or put off for a bit? This is just a daily and sees little to no off-road use, unfortunately…
     
  4. Feb 24, 2025 at 1:00 PM
    #4
    airforceb2cc

    airforceb2cc Well-Known Member

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    It wont hurt anything as long as you don't park in your in-laws' driveway and check your level regularly.
     
  5. Feb 24, 2025 at 1:04 PM
    #5
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Notes: only noticed it today and I’m under the truck often (due to CV axle troubles) and the last time I was under was about two or three weeks ago. assuming this happened between now and then AND keep oil levels good, I might be able to get away with not having to replace it within the next few months, right?
     
  6. Feb 24, 2025 at 1:09 PM
    #6
    airforceb2cc

    airforceb2cc Well-Known Member

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    Oh I've seen people go years with a seeping rear main. Its messy but will keep corrosion away...haha
     
  7. Feb 24, 2025 at 1:19 PM
    #7
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Also, might be a dumb question, but is there any kind of stop leak for this? I definitely will be paying very close attention to this, but thought I’d ask anyway
     
  8. Feb 24, 2025 at 1:21 PM
    #8
    airforceb2cc

    airforceb2cc Well-Known Member

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    Stay away from any stop-leak materials. The 0W-20 oil is very thin and runs through very tight oil journals and the stop-leak additive can just as easily clog a journal as it can a seeping seal.
     
  9. Feb 24, 2025 at 1:25 PM
    #9
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    upload_2025-2-24_13-24-56.png Man, thank you for the advice. It’s been frustrating to begin seeing my truck age, but thanks to folks on this forum like yourself, I can usually manage to calm myself down and remember that it’s eventually going to be ok and actually manageable over time. upload_2025-2-24_13-24-56.png
     
  10. Feb 24, 2025 at 1:27 PM
    #10
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Remaining question. That just came to Me: what is the plastic tab located at the bell end? I was wiping that down too and noticed oil beginning to accumulate there specifically
     
  11. Feb 24, 2025 at 1:28 PM
    #11
    airforceb2cc

    airforceb2cc Well-Known Member

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    One thing to note, if you live in dusty or sandy environments, try to keep it is clean as you can. Oily surfaces will attract abrasive stuff. A quick spritz of brake clean will go a long way.
     
  12. Feb 24, 2025 at 1:29 PM
    #12
    airforceb2cc

    airforceb2cc Well-Known Member

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    I believe you are talking about the "inspection plate" which is how you access the torque converter bolts. Not sure what other plastic tabs are under there...been a minute since I've dropped a trans.
     
  13. Feb 24, 2025 at 1:29 PM
    #13
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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  14. Feb 24, 2025 at 2:46 PM
    #14
    kahanabob

    kahanabob Well-Known Member

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    Wipe everything clean with brake cleaner then check every 4 or 5 days to see how fast it is accumulating.
     
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  15. Feb 24, 2025 at 3:15 PM
    #15
    Mallcrawler20

    Mallcrawler20 Well-Known Member

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    Next step is take it in and get it fixed .. why wait till it really becomes an issue …
     
  16. Feb 24, 2025 at 3:33 PM
    #16
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Great question/suggestion. Appreciate your feedback I will wait no longer and get this repaired asap
     
  17. Feb 24, 2025 at 3:35 PM
    #17
    TRD_0ffRd2017

    TRD_0ffRd2017 [OP] Well-Known Member

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    Agreed, I’m going to keep a VERY close eye on it. Gotta save to get this repaired and just needed a second opinion on whether or not this was a “don’t drive it like this” problem or a manageable one that gives me time to save.
     
  18. Feb 24, 2025 at 4:46 PM
    #18
    Diffident

    Diffident Well-Known Member

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    It's manageable, but it's going to get worse. I had a rear seal leak on my F150. It started out with me only needing to add one quart of oil between oil changes to needing to add a quart every week.
     
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