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Needle bearing issue?

Discussion in '5th Gen 4Runners (2010+)' started by COexplorer, Jan 8, 2019.

  1. Feb 23, 2021 at 9:23 AM

    MyWyfsRnnr Have you seen the mall?

    Feb 26, 2019
    First Name:
    Citrus Heights
    2018 4Runner TRD
    Prinsu, Blacked-out taillights, tinted fronts, BudBuilt Sliders, BudBuilt Skids, OME lift, 275/70/17 KO2's, LED interior, C4 Fab Diff Skid, Dvr Grab Handle, AnyTime Backup Camera, Badge Overlays, Wet Okole Covers
    Putting it in 4wd puts "pre-load" into the axles so they arent wobbling around which takes away the noise. The "wobble" is very small but that is the cause of the sound. The pre-load or tension on the axle, pins it to the bearing tighter so that it removes that vibration. Go under your truck and grab the axle and move it around watching the CV at the differential and you can see how much movement these have stock (even when they are not bad). When you install the bushing it cuts that movement in half which and supports the axle more. The ECGS bushing is a little longer than the stock needle bearing and has a much more consistent contact area. Hope that helps.
    thirdyota, McSpazatron and MeefZah like this.
  2. Feb 23, 2021 at 10:51 AM

    McSpazatron New Member

    Feb 16, 2021
    Being since toyota probably (maybe?) used needle bearings on purpose, is there any long term potential downside to a plain bearing? Heck, could it be possible toyota slightly oversizes on purpose? I have no idea, that is why Im asking.

    It’s just weird that toyota hasn't changed this setup for so long with the frequency of noise complaints. Is it possible they have a engineering based reason not to change them?

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