1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

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

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    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

    Joined:
    Oct 28, 2009
    Member:
    #25056
    Messages:
    12,671
    First Name:
    James
    South-Pole, Alabama
    Vehicle:
    2023 access cab V6
    Its probably just starting to seep.....
     
    jardoo[OP] likes this.
  3. Jun 10, 2024 at 10:15 AM
    #3
    RX1cobra

    RX1cobra Well-Known Member

    Joined:
    May 20, 2019
    Member:
    #293789
    Messages:
    2,074
    Gender:
    Male
    Vehicle:
    19 OR
    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

    Joined:
    May 2, 2017
    Member:
    #217977
    Messages:
    529
    Gender:
    Male
    First Name:
    Jerry
    Lynchburg VA
    Vehicle:
    16 Tacoma TRD Sport DCSB MGM
    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

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    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

    Joined:
    May 2, 2017
    Member:
    #217977
    Messages:
    529
    Gender:
    Male
    First Name:
    Jerry
    Lynchburg VA
    Vehicle:
    16 Tacoma TRD Sport DCSB MGM
    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

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    will do.

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

    FlyFisherCJ Well-Known Member

    Joined:
    Sep 20, 2016
    Member:
    #197786
    Messages:
    214
    Gender:
    Male
    First Name:
    Cameron
    Twin Falls ID
    Vehicle:
    2017 TRD OR DCLB
    part number for the pcv valve?
     
    jardoo[OP] likes this.
  9. Jun 10, 2024 at 12:34 PM
    #9
    rolled93slc

    rolled93slc Well-Known Member

    Joined:
    May 2, 2017
    Member:
    #217977
    Messages:
    529
    Gender:
    Male
    First Name:
    Jerry
    Lynchburg VA
    Vehicle:
    16 Tacoma TRD Sport DCSB MGM
    12204-0P020
     
  10. Jun 10, 2024 at 1:36 PM
    #10
    jardoo

    jardoo [OP] Well-Known Member

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    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

    Joined:
    May 2, 2017
    Member:
    #217977
    Messages:
    529
    Gender:
    Male
    First Name:
    Jerry
    Lynchburg VA
    Vehicle:
    16 Tacoma TRD Sport DCSB MGM
    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

    Joined:
    Oct 11, 2014
    Member:
    #140097
    Messages:
    23,085
    Gender:
    Male
    First Name:
    Billy
    Largo Florida
    Vehicle:
    '13 5 lug AC w/convenience package
    A few OE parts from fancy trucks
    You're going to pull the trans for that little seep?

    :eek:
     
    jmneill, kahanabob and Chew like this.
  13. Jun 11, 2024 at 6:37 AM
    #13
    jardoo

    jardoo [OP] Well-Known Member

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    I don’t know, what should I do?
     
  14. Jun 11, 2024 at 6:42 AM
    #14
    Delta09

    Delta09 I Eat Glue

    Joined:
    Apr 29, 2019
    Member:
    #291677
    Messages:
    10,182
    Gender:
    Male
    First Name:
    Adam
    South Central PA
    Vehicle:
    2024 SR5 DCSB 4WD
    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

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    *orders new main seal*

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

    Delta09 I Eat Glue

    Joined:
    Apr 29, 2019
    Member:
    #291677
    Messages:
    10,182
    Gender:
    Male
    First Name:
    Adam
    South Central PA
    Vehicle:
    2024 SR5 DCSB 4WD
    :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

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    ya I’m gonna replace the pvc first, see if that works.

    but I’m still ordering the rear main seal just for backup.
     
    Delta09[QUOTED] likes this.
  18. Jun 11, 2024 at 7:16 AM
    #18
    b_r_o

    b_r_o Gnar doggy

    Joined:
    Nov 17, 2016
    Member:
    #202672
    Messages:
    13,489
    First Name:
    Alex
    WA
    Vehicle:
    2015 DCLB
    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

    Joined:
    Mar 30, 2016
    Member:
    #182793
    Messages:
    955
    Gender:
    Male
    First Name:
    Mike
    Beirut, Lebanon
    Vehicle:
    2016 DOUBLE CAB MGM 4X4 TRD OFF ROAD SHORT BED
    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

    Joined:
    Dec 7, 2019
    Member:
    #312767
    Messages:
    1,218
    Gender:
    Male
    central lower mich
    Vehicle:
    2019 Tacoma Sport OV Tuned, Cement
    dd light bars, trd cat back exhaust, KDMax tuned, trd skid plate, 2" lift, sema wheels toyo open country at3 tires.
    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
     

Products Discussed in

To Top