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Wheel well noises with video- please HELP

Discussion in '1st Gen 4Runners (1984-1989)' started by 87Chewie4runner, Sep 8, 2025 at 9:46 AM.

  1. Sep 8, 2025 at 9:46 AM
    #1
    87Chewie4runner

    87Chewie4runner [OP] New Member

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    Hello fellow Yota drivers! Im reposting this because im hoping for actual help- anyone have a PHOTO of an Aisin automatic locking hub broken down in order? I think something might be out of place-

    I recently had some help replacing my driver's side axle with new boots (previously did the passenger side with no issue but did not have time this round to refurbished the original axle and put new boots so I purchased an after market one already assembled. The cap that butts to the differential was flat and not like the original that bumps out and sits very specifically (I called the yotashop and was confirmed the part should work,
    Ahead of time). I drove a couple hours before hearing what sounded like a slow uneven washing machine "ca- thunk dunk, ca-thunk-dunk" and went away. I called the mobile mechanic who told me I should get an allignment because yes we did replace both the upper and lower ball joints at that time. Couple days later... same noise. Got out and looked several times and nothing looks obviously wrong or amiss. Today while heading home it was making a new noise for longer but has since also gone away. I did get a video of this newer noise but not of the loud (you can feel it) thunking noise. Any idea where i might want to focus? Could the auto locking hubs be assembled back wrong? Looking through my Toyota Bible at the diagram i can't tell if things right or not and can't seem to find anything online that shows a full disassembly of the auto locking hubs OR an image that shows everything. Ive had my truck for probably close to 10 years now and typically do my own repairs until this drivers side axle. Already spent too much time getting this dealt with and ready to cry as I've spent basically all the money I have to get help this most recent repair. Again- video does NOT show the initial louder thunking

    https://photos.app.goo.gl/tezaEb5HZpYBMGxt9
     
  2. Sep 8, 2025 at 11:55 AM
    #2
    BS67

    BS67 8404 USMC Doc

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  3. Sep 8, 2025 at 12:27 PM
    #3
    JET4

    JET4 Old Member

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  4. Sep 8, 2025 at 7:09 PM
    #4
    4onto

    4onto New Member

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    One thing to try is take both automatic hubs off and disassemble each separately and compare them. Worst comes to worst, new or used manual locking hubs (Aisin or aftermarket) are common and inexpensive and should work in place of the automatic hubs. As well, installing a pair of manual hubs can be useful to help diagnose the noise and keep the 4Runner on the road while tinkering with the automatic hubs.
     
  5. Sep 9, 2025 at 8:34 AM
    #5
    87Chewie4runner

    87Chewie4runner [OP] New Member

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    @4onto yes thats what I think im going to have to do as there doesn't seem to be any other solution
     
  6. Sep 9, 2025 at 8:43 AM
    #6
    4onto

    4onto New Member

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    ^^^My '94 Pickup came with factory front hub drive flanges to work with the front A.D.D. I swapped them for Aisin manual locking/freewheeling hubs and are very happy with them. Lately, I've be leaving them locked so the A.D.D. system/shift-on-the-fly works normally like when it had drive flanges.

    https://www.yotatech.com/forums/f12...ing-hubs-add-auto-hubs-questions-here-239443/

    Yotatech is good site for old-school Toyota trucks and SUVs (if you weren't familiar already).
     
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