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Faint whistle or whine while accelerating

Discussion in '3rd Gen. Tacomas (2016+)' started by jaro, Mar 8, 2021.

  1. Oct 28, 2021 at 7:53 AM
    #41
    G8R_Taco

    G8R_Taco Caught a hall pass…

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    My 19 does this too. I believe it to be the planetary gears in the transmission on the underdrive gears. It seems like it goes away in 4th and the two overdrive gears but I need to verify that with my scangauge next time I’m out.
    Either way, I’m not worried about it.
    I look at it like rear diff whine for the tranny :rolleyes:
     
  2. Oct 28, 2021 at 8:41 AM
    #42
    ezatnova

    ezatnova Artax

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    The noise here is AC related. Shutting AC off instantly stops it, even mid noise while it’s doing it. There are probably other similar whines but this once comes from right in the middle of the cowl/engine bay, and is AC clutch.
     
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  3. Oct 28, 2021 at 9:05 AM
    #43
    FL_TRD Sport

    FL_TRD Sport KDMax Pro Authorized Tuner SE Florida

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    I'm assuming it's just an annoyance and if I don't do the fix it's no big deal? Or is it something that if I don't fix the AC clutch going to explode eventually, like when I'm out of warranty? :annoyed:
     
  4. Oct 28, 2021 at 9:55 AM
    #44
    vecdran

    vecdran Barely-Known Member

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    It's an AC expansion valve. Perfectly normal apparently.
     
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  5. Oct 28, 2021 at 10:18 AM
    #45
    FL_TRD Sport

    FL_TRD Sport KDMax Pro Authorized Tuner SE Florida

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    About 4 years ago when we remodeled our kitchen we bought a new Frigidaire Gallery refrigerator. The thing made so many weird noises that were perfectly normal when it goes through it's various maintenance cycles that Frigidaire actually put an appendix in the back of the owner's guide that had a table listing all the noises and what was happening. This apparently cut their warranty service calls significantly. Might be an idea for the Tacoma owners' manual :cool:
     
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  6. Oct 28, 2021 at 10:46 AM
    #46
    Red Alert

    Red Alert Well-Known Member

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    My 22 year-old Admiral has done it since day one. Still running like a champ.
     
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  7. Oct 28, 2021 at 11:00 AM
    #47
    FL_TRD Sport

    FL_TRD Sport KDMax Pro Authorized Tuner SE Florida

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    And hopefully so will my truck :)
     
  8. Oct 28, 2021 at 1:28 PM
    #48
    MasOlas

    MasOlas Well-Known Member

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    I've had the same thing on my '19 and have just dealt with it. I'll try the AC on/off like people have suggested.

    The noise got lower when I lifted and changed tires, but it's still there.
     
  9. Oct 28, 2021 at 1:37 PM
    #49
    Dirty Harry

    Dirty Harry Well-Known Member

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    This is EXACTLY what mine sounds like.

    My 2016 v6 didn't do it. My 2021 i4 does. I don't think its anything to be concerned about, but it is a little strange.
     
  10. Feb 1, 2022 at 4:12 PM
    #50
    ezatnova

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    Here we go. Finally got Toyota to admit it and fix it :muscleflexing:

    403C2B83-66C5-45B3-8C17-F27692D41FAB.jpg
     
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  11. Feb 1, 2022 at 4:34 PM
    #51
    dcarcagno

    dcarcagno Well-Known Member

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    Sweet! How would I go about getting this fixed?
     
  12. Feb 1, 2022 at 5:16 PM
    #52
    ezatnova

    ezatnova Artax

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    It’s a TSB, so you just go to the dealership and tell them to fix it
     
  13. Feb 1, 2022 at 6:25 PM
    #53
    Canadian Caber

    Canadian Caber R.I.P Layne Staley 67-2002

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    B.C. Canada, eh
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    Please follow up and let us know how it goes. What they have to rip apart or any issues after the repair.
     
    Last edited: Feb 11, 2022
  14. Feb 1, 2022 at 6:32 PM
    #54
    bulalo

    bulalo Well-Known Member

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    Nice find. My 2017 has been doing it since new but not as frequent or loud as before. It still blows ice cold air even in the 100+F SoCal heat in summer traffic .
     
  15. Feb 1, 2022 at 7:01 PM
    #55
    ezatnova

    ezatnova Artax

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    Will do. But it’s just a full dash rip apart to get to the fan assembly. Then it gets replaced! Curious what the part difference is.
     
    Last edited: Feb 11, 2022
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  16. Feb 11, 2022 at 9:49 AM
    #56
    dcarcagno

    dcarcagno Well-Known Member

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    Just took mine to the dealer. They heard the noise and are ordering the parts. Should be done next week. How involved is this repair? Anyone know?
     
  17. Feb 11, 2022 at 11:00 AM
    #57
    ezatnova

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    like I just said in the prior post, it’s a full dash removal. Also bolts from the front cowl. Not a quick job
     
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  18. Feb 11, 2022 at 12:10 PM
    #58
    dcarcagno

    dcarcagno Well-Known Member

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    thanks! Glad I don’t have do do it.
     
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  19. Feb 12, 2022 at 1:42 PM
    #59
    bulalo

    bulalo Well-Known Member

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    I wonder which is worse. An occasional whistle or a creaking dash after the repair
     
  20. Feb 12, 2022 at 2:57 PM
    #60
    FL_TRD Sport

    FL_TRD Sport KDMax Pro Authorized Tuner SE Florida

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    I was just thinking that myself. My truck does it from time to time, more so when I'm heavy on the gas. But, my truck has zero rattles in the dash. Wonder if I'd be trading a whistle for a rattle.
     
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