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Engine Whining

Discussion in '3rd Gen 4Runners (1996-2002)' started by GandalfTheWhite, Oct 2, 2017.

  1. Oct 2, 2017 at 5:23 PM
    #1
    GandalfTheWhite

    GandalfTheWhite [OP] New Member

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    Elliott
    Seattle, Washington
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    My 4Runner has started making a whining noise upon acceleration (I think just the first two gears) and have no idea what it is. My mechanic does not know what it is but he said it should be cheap to replace. Not too worried about it right now because it is not damaging my car but wanted to know if you guys have had any experience with this problem so I could find out more information. My 4Runner is a 01' SR5. Thanks!
     
  2. Oct 2, 2017 at 5:48 PM
    #2
    PVT Pablo

    PVT Pablo

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    Does the whining get louder with more engine load? Does it whine at idle? What about changes dependant on speed?
     
  3. Oct 2, 2017 at 5:51 PM
    #3
    GandalfTheWhite

    GandalfTheWhite [OP] New Member

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    It stays pretty consistent throughout all changes. It's like an electronic whining
     
  4. Oct 2, 2017 at 6:30 PM
    #4
    PVT Pablo

    PVT Pablo

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    So in third gear the whining goes away?

    The reason I ask is because the bearings on the engine pulley's are notoriously shitty. They are open to the elements and tend to get noisy over time. My Tacoma enjoyed singing me a whining sound that was dependent on RPM's, even when in neutral if I revved it the whining got louder. If you want to try to isolate the noise without spending to much money, try getting a mechanics stethoscope and probing the engine, pulleys, alternator, starter, transmission, ect. Its a great tool and will at least get you to the general area so you're not just at the mercy of your mechanic.
     
    TN_TRAIL and GPSevinSixx like this.
  5. Oct 2, 2017 at 6:34 PM
    #5
    GandalfTheWhite

    GandalfTheWhite [OP] New Member

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    I'm not entirely sure if it goes away in third gear but it's not there through the entirety of acceleration
     
  6. Oct 2, 2017 at 6:35 PM
    #6
    PVT Pablo

    PVT Pablo

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    It may just get so high pitched that you can't hear it anymore. I know in my situation at higher RPM's the noise was drowned out by engine/exhaust noise.

    Again I'm just shooting from the hip not being able to actually check out the vehicle in person.
     
  7. Oct 2, 2017 at 6:37 PM
    #7
    GandalfTheWhite

    GandalfTheWhite [OP] New Member

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    Right, well thanks so much for the help!
     
  8. Jan 1, 2018 at 9:22 AM
    #8
    drmr31

    drmr31 NOT teq. It's toyota.

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    Steve
    FLX Region, NY
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    1-1/2" Fnt Leveling: Bilstein to Toytec preloading spacer
    Happy New Year GandalfTheWhite. My son's White 1997 T4R-- AKA "Shadowfax" is from NC and hasn't a speck of rust top-to-bottom. It has 345,000 and mechanically sound with recent timing belt change and fluids chg'd regularly. It's the 5th 3rd Gen in our family and none of them have ever had the whining noise you've described. Curious... Did you ever determine or resolve your issue? Seemingly, the whining noise from Shadowfax is coming from the top-end of the motor while idling and increases with acceleration, yet it stops at 4th gear. Your thoughts?
     
    Last edited: Jan 1, 2018
  9. Jan 1, 2018 at 9:25 AM
    #9
    GandalfTheWhite

    GandalfTheWhite [OP] New Member

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    I discovered that the noise is coming from my transmission. Have to get it rebuilt
     
  10. Jan 1, 2018 at 11:58 AM
    #10
    drmr31

    drmr31 NOT teq. It's toyota.

    Joined:
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    Steve
    FLX Region, NY
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    2016 4RUNNER TRD Pro [quicksand] "Chief"
    1-1/2" Fnt Leveling: Bilstein to Toytec preloading spacer
    Dang-- he'll have to hope for the best! He's planning to drop in his old manual tranny (from his last 97) next weekend. Talk about a complicated job! Luckily, Dad's not helping with that project
     

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