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Is my transmission leaking?

Discussion in '3rd Gen. Tacomas (2016-2023)' started by jardoo, Jun 10, 2024.

  1. Jun 10, 2024 at 10:09 AM
    #1
    jardoo

    jardoo [OP] Well-Known Member

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    I’m down here doing a drain and fill.
    I touched it and it’s dry and powdery.

    thanks

    IMG_0720.jpg
    IMG_0721.jpg
     
    HondaGM likes this.
  2. Jun 10, 2024 at 10:12 AM
    #2
    HondaGM

    HondaGM CallSign Monke

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    Its probably just starting to seep.....
     
    jardoo[OP] likes this.
  3. Jun 10, 2024 at 10:15 AM
    #3
    RX1cobra

    RX1cobra Well-Known Member

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    I'd say more likely rear main seal vs the trans.
     
    Jakerou, Chew, FlyFisherCJ and 2 others like this.
  4. Jun 10, 2024 at 10:15 AM
    #4
    rolled93slc

    rolled93slc Well-Known Member

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    It's most likely the rear main seal seeping. How many miles? Have you changed your PCV valve? If you haven't, I'd start there. Clean it off and recheck in a few hundred miles.
     
    kahanabob likes this.
  5. Jun 10, 2024 at 10:46 AM
    #5
    jardoo

    jardoo [OP] Well-Known Member

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    about 120 miles.
    No I haven’t, is that easy to replace?

    should I bother changing my trans fluid right now?

    do I need to replace both my pcv valve and rear main seal ?

    thanks
     
  6. Jun 10, 2024 at 10:54 AM
    #6
    rolled93slc

    rolled93slc Well-Known Member

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    It's pretty easy to do. It's on the driver valve cover. It can be a little tricky to get to, but easy to change.

    I would still do the trans fluid like you planned.

    I wouldn't worry about the rear main, until you change the PCV, clean the oil off the block, trans and old pan. And drive for a few hundred miles to see if it returns.
     
    kahanabob likes this.
  7. Jun 10, 2024 at 10:55 AM
    #7
    jardoo

    jardoo [OP] Well-Known Member

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    will do.

    thanks so much.
     
    rolled93slc[QUOTED] likes this.
  8. Jun 10, 2024 at 12:29 PM
    #8
    FlyFisherCJ

    FlyFisherCJ Well-Known Member

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    part number for the pcv valve?
     
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  9. Jun 10, 2024 at 12:34 PM
    #9
    rolled93slc

    rolled93slc Well-Known Member

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    12204-0P020
     
  10. Jun 10, 2024 at 1:36 PM
    #10
    jardoo

    jardoo [OP] Well-Known Member

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    Which one of these is the right part number for the rear main seal? Did they update it and make a better seal?

    thanks.

    IMG_0725.png
    IMG_0722.jpg
     
  11. Jun 11, 2024 at 5:27 AM
    #11
    rolled93slc

    rolled93slc Well-Known Member

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    90311-A0027 is what I come up with in the EPC.
     
    jardoo[OP] likes this.
  12. Jun 11, 2024 at 5:31 AM
    #12
    Clearwater Bill

    Clearwater Bill Never answer an anonymous letter

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    You're going to pull the trans for that little seep?

    :eek:
     
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  13. Jun 11, 2024 at 6:37 AM
    #13
    jardoo

    jardoo [OP] Well-Known Member

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    I don’t know, what should I do?
     
  14. Jun 11, 2024 at 6:42 AM
    #14
    Delta09

    Delta09 This Space Left Blank

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    I dunno, I've seen a slight rear main leak turn into lose all your oil in 40 seconds. Not saying that is going to happen, but the slight risk of losing a $10K engine is not worth the gamble.
     
  15. Jun 11, 2024 at 6:43 AM
    #15
    jardoo

    jardoo [OP] Well-Known Member

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    *orders new main seal*

    also, what else should I replace since I’ll be down there ?
     
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  16. Jun 11, 2024 at 6:46 AM
    #16
    Delta09

    Delta09 This Space Left Blank

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    :laugh:

    This was on some old American iron, so I doubt this would actually happen on something modern. But, it's something I'd replace sooner than later. I'm gonna catch some flack for the comment, so be it.

    I don't think there's anything else to really replace in that area.
     
    jardoo[QUOTED][OP] likes this.
  17. Jun 11, 2024 at 6:48 AM
    #17
    jardoo

    jardoo [OP] Well-Known Member

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    ya I’m gonna replace the pvc first, see if that works.

    but I’m still ordering the rear main seal just for backup.
     
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  18. Jun 11, 2024 at 7:16 AM
    #18
    b_r_o

    b_r_o Gnar doggy

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    My 4.0 has had that same size dark spot right there for years. Hasn't gotten any worse so I'm not doing anything about it

    If it was a jeep or a Chevy it would be dripping liquid oil

    I'd let it ride. It's not even wet
     
  19. Jun 11, 2024 at 7:59 AM
    #19
    jardoo

    jardoo [OP] Well-Known Member

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    ok great.
    Yeah it felt more powdery and dry than wet.
     
  20. Jun 11, 2024 at 11:39 AM
    #20
    skidooboy

    skidooboy titanium plate tester

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    You understand, the trans or the motor has to come out to replace the rear main seal, correct? Unless it was leaking very badly, I wouldnt pull a motor for that seal. You are over thinking it. Ski
     

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