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

Diff breather mod issues?

Discussion in '3rd Gen. Tacomas (2016+)' started by Jros3322, Jun 30, 2021.

  1. Jun 30, 2021 at 10:59 AM
    #1
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    6F3417C7-9C7F-40BE-B05D-A699CD419A1F.jpg As the title says I’ve been having trouble with what I’ve heard is a relatively simple and helpful mod. For some reason I cannot find a single union to thread into the diff apart from the oem one way valve, I have tried four different unions with no luck, is the threading different on Limited slip differentials compared to rear locking ones? Any info is helpful.
     
  2. Jun 30, 2021 at 11:03 AM
    #2
    Tacoma Mike

    Tacoma Mike 48 Year Chrysler/Toyota/ASE/ Master Tech.RETIRED

    Joined:
    Aug 6, 2011
    Member:
    #61230
    Messages:
    24,829
    Gender:
    Male
    First Name:
    Mike
    Southern Maine
    Vehicle:
    2011 Double Cab V6
    Large Storage Box, 02610 intermittent switch swap, "Hot Wire" Power Outlets, DRL Shut Off, Disable Fob Beep, Disable Seat Belt Buzzers, Parking Light Mod, Battery Tender, 4 Leaf Spring Pack, Rear Headrest Removal, Factory Tow Package (7 Pin) Rear Diff Mod, Taco Lean Mod, 2WD Low ECU.
  3. Jun 30, 2021 at 11:25 AM
    #3
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    Thank you for the thread link, but as you can see by my photo I have tried the part number listed and it does not thread into the diff.
     
  4. Jun 30, 2021 at 11:28 AM
    #4
    Millhouse516

    Millhouse516 Traveling by Tacoma

    Joined:
    Sep 4, 2019
    Member:
    #304281
    Messages:
    159
    Gender:
    Male
    San Diego
    Vehicle:
    Silver 2019 DCSB SR5
    5100's - Icon AAL - RTT - DIY Awning - DIY Mods
  5. Jun 30, 2021 at 11:30 AM
    #5
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    I’ll give that one a try, I tried a similar one in the picture but again no luck, seeing as you also have an LSD this should hopefully help will respond with updates as soon as that comes in.
     
  6. Jun 30, 2021 at 12:54 PM
    #6
    Tacoma Mike

    Tacoma Mike 48 Year Chrysler/Toyota/ASE/ Master Tech.RETIRED

    Joined:
    Aug 6, 2011
    Member:
    #61230
    Messages:
    24,829
    Gender:
    Male
    First Name:
    Mike
    Southern Maine
    Vehicle:
    2011 Double Cab V6
    Large Storage Box, 02610 intermittent switch swap, "Hot Wire" Power Outlets, DRL Shut Off, Disable Fob Beep, Disable Seat Belt Buzzers, Parking Light Mod, Battery Tender, 4 Leaf Spring Pack, Rear Headrest Removal, Factory Tow Package (7 Pin) Rear Diff Mod, Taco Lean Mod, 2WD Low ECU.
    Crap..
    Knowing them they changed it again..
    Got no way to confirm that anymore…
    Sorry ..
     
  7. Jun 30, 2021 at 12:57 PM
    #7
    Skydvrr

    Skydvrr IG: @kalopsianick

    Joined:
    Sep 13, 2017
    Member:
    #229889
    Messages:
    12,556
    First Name:
    Nick
    YMH
    Vehicle:
    Black '17 OR

    Did ya booger the threads up while taking it out? Or is the OD/ID the wrong size?
     
    SR-71A likes this.
  8. Jun 30, 2021 at 1:46 PM
    #8
    Smacky2020

    Smacky2020 Well-Known Member

    Joined:
    May 4, 2020
    Member:
    #326715
    Messages:
    487
    First Name:
    Chris
    Bristol, VA
    Vehicle:
    2020 TRD ORDC - Cement
    Stock wheels and suspension. Random "utilitarian" mods featured on this great forum.
    Yeah... check the threads in the pumpkin to make sure they're not galled up with the original breather. When I removed mine, it was in there pretty damn tight so factory overtightened mine and the silver union threaded in without issues.

    From reading many prior posts, the thread pattern is some kind of a British pipe thread and not very close to any standard US npt. Check the original breather threads and make sure none are missing or chewed up. Again, no issues doing this with the silver toyota union PN on my 2020 OR.
     
  9. Jun 30, 2021 at 5:49 PM
    #9
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    The threads seem okay they seem a little flatter I guess on the oem than the the other options, I figured it could have been overtightened or maybe weirdly cross threaded but the oem breather always threads back in with 1-2 hand twists , the others will just spin and never even thread in a little
     
  10. Jun 30, 2021 at 5:53 PM
    #10
    Skydvrr

    Skydvrr IG: @kalopsianick

    Joined:
    Sep 13, 2017
    Member:
    #229889
    Messages:
    12,556
    First Name:
    Nick
    YMH
    Vehicle:
    Black '17 OR

    What happens when u compare OD and thread pitch? Do they fall in together?
     
    G8R_Taco likes this.
  11. Jun 30, 2021 at 5:56 PM
    #11
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    It’s really hard to tell, I’ve since put the oem one back in. They look incredibly close out of the diff, probably why everyone else seems to have no trouble using the commonly recommended ones. It almost looks/feels like it was made too thin, and the oem one was kinda jammed in there while somehow not affecting the threading
     
  12. Jun 30, 2021 at 6:02 PM
    #12
    gudujarlson

    gudujarlson Well-Known Member

    Joined:
    Jul 2, 2019
    Member:
    #298083
    Messages:
    3,959
    Gender:
    Male
    Minnesota
    Vehicle:
    2020 TRD Off-Road DCSB 6MT
    Kings, Dakars, SPCs, 33's, Mobtown Sliders, TRD Skid
    I can’t answer your question, but I can point out one clarification. None of the 3rd gens have a limited slip differential. There is a locking diff found on the OR and Pro and an open diff on the other trims. There are also two different size diffs, but my knowledge gets a bit foggy. I’ve heard the manual transmission trims get the larger diff.
     
  13. Jun 30, 2021 at 6:10 PM
    #13
    Skydvrr

    Skydvrr IG: @kalopsianick

    Joined:
    Sep 13, 2017
    Member:
    #229889
    Messages:
    12,556
    First Name:
    Nick
    YMH
    Vehicle:
    Black '17 OR

    Interesting. I'd bet the start of the threads on top of the axle are a lil joed up. How carefully did you try rethreading the new one?
     
  14. Jun 30, 2021 at 6:12 PM
    #14
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    I haven’t tried messing with any sort of rethreading, I’ve bought all the ones in the above picture and none of them seem to thread in
     
  15. Jun 30, 2021 at 6:15 PM
    #15
    Skydvrr

    Skydvrr IG: @kalopsianick

    Joined:
    Sep 13, 2017
    Member:
    #229889
    Messages:
    12,556
    First Name:
    Nick
    YMH
    Vehicle:
    Black '17 OR

    Sorry, I meant restarting the new union. Lots of down pressure and turning counterclockwise until it clicks, then clockwise?
     
    woollypullover and SR-71A like this.
  16. Jun 30, 2021 at 6:15 PM
    #16
    TXP

    TXP Member

    Joined:
    Jul 11, 2020
    Member:
    #334120
    Messages:
    19
    Gender:
    Male
    First Name:
    Tom
    Vehicle:
    2019 Tacoma TRD PRO
    I just installed the silver union. It did not thread in as easy as I thought it would. I was able to start the first thread by hand, but then I had to really wrench on it to get it in.
    The factory one was also hard to remove. I looked at the threads and they seemed. fine
     
  17. Jun 30, 2021 at 6:17 PM
    #17
    Jros3322

    Jros3322 [OP] Member

    Joined:
    Sep 12, 2020
    Member:
    #340598
    Messages:
    17
    Gender:
    Male
    First Name:
    Jake
    Vehicle:
    2020 Quicksand TRD Sport
    That was part of my issue as well, I’ve tried using some significant force to get it there but still no dice, I am also worried about really jamming it in there because I’ve read some horror stories about damaging the threads and having to rethread the diff
     
  18. Jun 30, 2021 at 6:33 PM
    #18
    Lt. Dangle

    Lt. Dangle RIP @stun gun 2016-2020

    Joined:
    Jan 25, 2017
    Member:
    #208645
    Messages:
    5,847
    Ohio
    Vehicle:
    2017 7544
    Thingamajiger, doohickey and Rotator Spline
    https://www.threadtoolsupply.com/thread-checker.html

    OP, pick one of these gizmos up to check the threads of both fittings to make sure they are the same. You could also pick up a thread chaser to make sure the threads in the diff are good.
     
    Jros3322 [OP] likes this.
  19. Jun 30, 2021 at 6:39 PM
    #19
    TXP

    TXP Member

    Joined:
    Jul 11, 2020
    Member:
    #334120
    Messages:
    19
    Gender:
    Male
    First Name:
    Tom
    Vehicle:
    2019 Tacoma TRD PRO
    Mine did go in smoothly or else I would have stopped. There is some comfort knowing the replacement is aluminum and would get stripped before the diff threads would.
    I did read another post where they had the same problem and watched a YouTube vid where it looked like the guy had to use some force to get it in. I chalked it up to using a smaller wrench and being under the truck while turning it.
    So much for quick and easy mod. Good luck with yours.
     
    Jros3322 [OP] likes this.
  20. Jun 30, 2021 at 6:57 PM
    #20
    NorrinRadd

    NorrinRadd Well-Known Member

    Joined:
    Jan 25, 2020
    Member:
    #317188
    Messages:
    838
    Gender:
    Male
    WA
    Vehicle:
    2019 TRD Sport, access cab, MT, tow, silver.
    My 2019 Sport factory breather was on really tight also but it finally loosened and I used the Amazon silver breather and it threaded in just fine. Maybe the 2020 Sport changed it?
    /gg Toyota
     

Products Discussed in

To Top