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

3rd Gen Poll: Rear End Noise howling when feathering throttle

Discussion in '3rd Gen. Tacomas (2016+)' started by smitty99, Jul 21, 2016.

?

Does your rear end make a slight howling noise at 50-65mph when feathering throttle?

  1. Yes

  2. No

  3. Have not checked it yet but will report back

Results are only viewable after voting.
  1. May 11, 2020 at 1:46 PM
    #5961
    ryan760

    ryan760 Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #294438
    Messages:
    1,479
    Gender:
    Male
    California
    Vehicle:
    2019 TRD OR, 4x4, Tech, AT, Silver
    Bed mat lol
    Yeah you must have had a different issue as your situation seems to be the inverse of what everyone else is having. Usually the truck is silent for 500-2000 miles then the howl develops and gets worse over time. Mine peaked at around 3000 miles and has since been about the same... now at 5300 miles.
     
  2. May 11, 2020 at 3:54 PM
    #5962
    ryan760

    ryan760 Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #294438
    Messages:
    1,479
    Gender:
    Male
    California
    Vehicle:
    2019 TRD OR, 4x4, Tech, AT, Silver
    Bed mat lol
    I'm not sure, but check this out (bottom right side of page)...

    https://books.google.com/books?id=U4TBoJB2zgsC&pg=PA985&lpg=PA985&dq=axle+whine+howl&source=bl&ots=MXRWSoRMqk&sig=ACfU3U1Ud9Tt6xjZJ4QrK3GurPuqGh_fPA&hl=en&sa=X&ved=2ahUKEwjrvvfg8qzpAhVUrJ4KHfOvB_k4ChDoATADegQICBAB#v=onepage&q=axle whine howl&f=false

    IMO, it's worth a shot, especially since these diffs are known to come slightly low on oil from the factory. It's on my list of things to experiment with.
     
  3. May 11, 2020 at 5:40 PM
    #5963
    zoo truck

    zoo truck Well-Known Member

    Joined:
    Apr 21, 2020
    Member:
    #325379
    Messages:
    223
    Gender:
    Male
    First Name:
    Kenny
    Vehicle:
    2020 quicksand sr5 tacoma
    None
    Only issue now with noise is on a very windy day while driving against head winds. The wind noise becomes annoying as it hits the tonneau cover
     
  4. May 11, 2020 at 5:45 PM
    #5964
    shakerhood

    shakerhood Well-Known Member

    Joined:
    Aug 9, 2015
    Member:
    #161370
    Messages:
    27,082
    Gender:
    Male
    Southern Ohio
    Vehicle:
    2017 MGM DCSB Off Road, 6 Speed MT, P&T
    Many people in this thread have tried different grades of gear oil with no change, the cause of the noise is supposed to be from a harmonic vibration.
     
    MannyS, ryan760 and The Real Moondog like this.
  5. May 14, 2020 at 9:37 AM
    #5965
    DontPanic

    DontPanic Well-Known Member

    Joined:
    Feb 27, 2009
    Member:
    #14136
    Messages:
    127
    Gender:
    Male
    VA
    The consensus: Toyota is aware. They tried to mitigate the symptom by reducing the amount of resonance entering the cab via TSB that applied to earlier model years. It didn't do much. They are still playing with spring options as of current model year. Resonance is generally not a difficult thing to remedy if one is able to find the source, you just change the mass or characteristics of the resonating part - according to an engineer from another field their guess is that Toyota isn't chasing this very hard or it would be fixed by now. New Tacomas were meant to include the mitigation measures but they do not probably because they do not work and consequently the cost not justified. People have tried friction modifiers, climbing oils, and heavier diff oils without success. Lifts etc will change a lot of things at once on the suspension so it's conceivable they would change resonating characteristics.
     
    Blackbeard83 and AKGSD like this.
  6. May 14, 2020 at 12:26 PM
    #5966
    ericf

    ericf Well-Known Member

    Joined:
    Jan 7, 2013
    Member:
    #94698
    Messages:
    53
    Gender:
    Male
    First Name:
    Eric
    Texas Gulf Coast, Houston
    Vehicle:
    2020 TRD offroad 4x4 silver sky.
    lomax tonneau, amp bed extender , bed rug
    Did I read in here that a lift is a cure?
    If so how much of a lift to get results?
    My 2020 has started to get quite noisy between 50 -59. 6000k miles
     
  7. May 14, 2020 at 2:50 PM
    #5967
    zoo truck

    zoo truck Well-Known Member

    Joined:
    Apr 21, 2020
    Member:
    #325379
    Messages:
    223
    Gender:
    Male
    First Name:
    Kenny
    Vehicle:
    2020 quicksand sr5 tacoma
    None
    Well, i just hit a bit over 2k miles. Truck is quieter than a church mouse when cruising 60 mph plus in the od gears. truck gets louder when the engine starts pulling 2500 rpm or higher up grades. Sounded like one of those rice rocket bikes.
     
  8. May 20, 2020 at 6:23 AM
    #5968
    CODSWALLOP

    CODSWALLOP Well-Known Member

    Joined:
    May 11, 2019
    Member:
    #293001
    Messages:
    62
    Gender:
    Male
    Vehicle:
    2019 Tacoma TRD ORSB
    skewp hood, running boards
    I drove my father-in-laws 18 which is the same spec as mine but one year older. While I can get his to whine it is very difficult. As he said if you don’t point it out you don’t notice it. It’s so quiet in comparison, I need swap his out with mine. He did not agree!
     
    Pablo8 and ryan760 like this.
  9. May 20, 2020 at 6:45 AM
    #5969
    ryan760

    ryan760 Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #294438
    Messages:
    1,479
    Gender:
    Male
    California
    Vehicle:
    2019 TRD OR, 4x4, Tech, AT, Silver
    Bed mat lol
    I really hate hearing that some trucks are quieter than others of the same spec. It just enforces the idea that something is actually wrong with these diffs, rather than just a minor NVH issue.

    Although it's possible your father in laws truck, being older, has different leaf springs or something else is different. They were experimenting with different springs around the 18, 19, and 20 MYs.
     
    jrshaw91450 likes this.
  10. May 20, 2020 at 8:58 AM
    #5970
    jrshaw91450

    jrshaw91450 Well-Known Member

    Joined:
    Oct 29, 2010
    Member:
    #45400
    Messages:
    72
    Gender:
    Male
    Maui
    Vehicle:
    2019 Cement Tacoma TRD OR 4x4
    TRD Cat back & Skid plate
    Mine seems to be getting worse. Was only 55-58 now its 38 and 50-61.
     
  11. May 20, 2020 at 9:15 AM
    #5971
    jrshaw91450

    jrshaw91450 Well-Known Member

    Joined:
    Oct 29, 2010
    Member:
    #45400
    Messages:
    72
    Gender:
    Male
    Maui
    Vehicle:
    2019 Cement Tacoma TRD OR 4x4
    TRD Cat back & Skid plate
    You have a lift or anything on your truck?
    Getting desperate enough to try some aluminum blocks in the back with 5100s up front and MT tires. curious if anyone did something similar and suppressed the noise. Shame cause im a big stock fan especially since I have a 100000 bumper to bumper warranty, but the whine is like an icepick in my brain.
     
    Blackbeard83, jetfishn and ryan760 like this.
  12. May 21, 2020 at 12:40 PM
    #5972
    jetfishn

    jetfishn Well-Known Member

    Joined:
    Dec 6, 2010
    Member:
    #47244
    Messages:
    113
    Gender:
    Male
    Has anyone tried insulating the axle tubes? Perhaps foam with tape wrap to test. I suspect the axle tubes are too thin, due to where they are mfg, cost cutting, something has changed in mfg that causes this resonating.
     
  13. May 22, 2020 at 3:14 PM
    #5973
    ryan760

    ryan760 Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #294438
    Messages:
    1,479
    Gender:
    Male
    California
    Vehicle:
    2019 TRD OR, 4x4, Tech, AT, Silver
    Bed mat lol
    The low frequency nature (400-500hz) of the howl makes it difficult to block since the wavelengths are rather long. I don't think you would have much success wrapping the axle tubes with foam. Your best bet is to get some professionally made acoustic material like dynamat and apply it to the back wall of the cab, but even then, dynamat works best on higher frequency noises since its relatively thin material. Their spec sheets show little noise reduction in the 300-600 hz range.

    I do think the axle tubes and pumpkin are transferring the noise and maybe amplifying it, but the only way to really fix that would be to make the metal thicker/change the mass properties. Probably also change the leaf spring densities and bushing design/material. Not exactly easy DIY changes! I think Toyota was on the right track with their TSB, but they just seemed to have given up on the problem which is rather annoying.
     
    Blackbeard83 and AKGSD like this.
  14. May 22, 2020 at 8:57 PM
    #5974
    jrshaw91450

    jrshaw91450 Well-Known Member

    Joined:
    Oct 29, 2010
    Member:
    #45400
    Messages:
    72
    Gender:
    Male
    Maui
    Vehicle:
    2019 Cement Tacoma TRD OR 4x4
    TRD Cat back & Skid plate
    You think Toyota has officially quit trying to fix this reflection of poor quality control? I would feel better if I knew they were still working on a fix. What’s crazy is they continue to manufacture these trucks dam well knowing there’s a major harmonic cab noise problem. I hope their bottom line is worth the tarnishing of this trucks legacy.
     
    jetfishn and AKGSD like this.
  15. May 23, 2020 at 6:04 AM
    #5975
    zoo truck

    zoo truck Well-Known Member

    Joined:
    Apr 21, 2020
    Member:
    #325379
    Messages:
    223
    Gender:
    Male
    First Name:
    Kenny
    Vehicle:
    2020 quicksand sr5 tacoma
    None
    As far as some toyotas being noises than others, i had to get use to the engine revving sound in my tacoma compared to the 4.7 tundra. I think overall my 19 year old tundra was quieter.
     
  16. May 23, 2020 at 6:36 AM
    #5976
    ryan760

    ryan760 Well-Known Member

    Joined:
    May 26, 2019
    Member:
    #294438
    Messages:
    1,479
    Gender:
    Male
    California
    Vehicle:
    2019 TRD OR, 4x4, Tech, AT, Silver
    Bed mat lol
    I just don't see how it would take them over 4 years to resolve it. They have some of the smartest engineers in the world working for them who could fix this rapidly if called upon and given enough resources. The fact that it's been going on for so long tells me one of two things: 1) The real fix would require a significant redesign of the diff, axle, suspension, frame, etc. (too much $$$), or 2) Not enough people are complaining about it/not losing enough sales to be worth their time.

    I am concerned that some people have it on acceleration vs deceleration though. That fits more along the lines of a gear setup issue even though Toyota and other reputable gear shops (ECGS) have said its not the gear setup. I swear though... I'd throw my money at any company who could fix this noise once and for all. :rofl:
     
    Last edited: May 23, 2020
    Blackbeard83, jetfishn and AKGSD like this.
  17. May 23, 2020 at 6:45 AM
    #5977
    zoo truck

    zoo truck Well-Known Member

    Joined:
    Apr 21, 2020
    Member:
    #325379
    Messages:
    223
    Gender:
    Male
    First Name:
    Kenny
    Vehicle:
    2020 quicksand sr5 tacoma
    None
    Is the howling noise really only prevalent to the dd cab tacomas, or are the access cabs howling as loud also? I've got 2100 miles on my access cab taco, theres absolutely no noise of such. I've got the v6 engine sound, but thats about it.
     
  18. May 23, 2020 at 8:48 AM
    #5978
    NMTrailRider

    NMTrailRider Well-Known Member

    Joined:
    Sep 28, 2009
    Member:
    #23469
    Messages:
    4,948
    New Mexico
    I had it on both acceleration and deceleration. And the pitch changed as I increased or decreased throttle. And it was loudest going down long hills.

    That’s why the pinion angle thing made sense to me. Going downhill, in theory, changes the geometry of the driveshaft/differential (gravity).
     
    Blackbeard83 and ryan760 like this.
  19. May 23, 2020 at 9:01 AM
    #5979
    jrshaw91450

    jrshaw91450 Well-Known Member

    Joined:
    Oct 29, 2010
    Member:
    #45400
    Messages:
    72
    Gender:
    Male
    Maui
    Vehicle:
    2019 Cement Tacoma TRD OR 4x4
    TRD Cat back & Skid plate
    I really wanted to keep it stock, so if I put a lift and MTs on in desperation to overpower the sound, then Toyota comes out with a fix, I will be pissed.
     
  20. May 23, 2020 at 11:30 AM
    #5980
    AKGSD

    AKGSD Warranty denied

    Joined:
    Apr 1, 2019
    Member:
    #288705
    Messages:
    809
    Gender:
    Male
    First Name:
    Joe
    Alaska
    Vehicle:
    2019 QSDCSBTRDOR4X4V6MT
    Dog hair, metaltech rocksliders, KBVooDoo bed risers, Smittybilt RTT, 3” spacer lift, caliraised ditch lights, amazon rock lights, Skewp
    They had a TSB for 17s & 18s. Mine allegedly has that in from factory. It still absolutely screams. I escalated mine to corporate, a tech came out, and guess what?
    “Toyota says it’s normal”

    They’re done trying to fix it
     

Products Discussed in

To Top