Whirring Noise From Rear End After Curb Smack

Discussion in 'Transmission & Drivetrain' started by Cassius, Aug 19, 2018.

  1. Cassius

    Cassius New Member

    First Name:
    Darren
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    Hey,

    First post here so if its been asked before, I'm sorry - I've searched diligently without finding a similar thread or answers. Some forum dudes get so righteous about this...

    So I was "testing" the latest iteration of my tunefile yesterday. I had been lucky until this incident as I've had the back come around a few times, these things do that so easily... Not this time, with no power on and just a bit of momentum the back came around so fast and LHS rear smacked the curb.

    I drove back to our workshop gingerly to get out of the danger zone as every bellend and their dog has a dash cam here just waiting to send the footage to the police.

    There was a new whirring/buzzing noise under power coming from the affected wheel area and maybe the feeling of a flat tire. It was uncool.

    I got the car on the hoist and to my surprise the rim was relatively unscathed, just a bit of wife like curb rash carelessness.
    I looked everywhere, toe control arm, all the bushes and rod ends - nothing obvious. Put the car in 1st gear and let the wheels turn. The wheel/tire is running true, the half-shaft/axle on the affected side looked fine. The wheel looks to be at the correct angle and evenly spaced outside the wheel arch.

    So I took it out for another spin to see that I wasn't being a hypochondriac - definitely something wrong, whirring buzzing under load over 80km/hr. Back on the hoist, pulled the wheel off, still nothing obvious, pulled the wheel bearing assembly out, it feels like a new one should (hard to simulate any sort load obviously but nicely stiff and smooth). Haven't pulled out the whole half-shaft yet but as I said before it was running true and silently on initial inspection.

    Am I missing something obvious? Will pulling the axle show up any issues with the CV ends if they exist? Or maybe I've munted the diff?

    Any good help or a similar story and remedy will be greatly appreciated.
     
  2. moffetts

    moffetts Well-Known Member

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    Definitely start with a new hub/bearing assembly on that side. When they are damaged they can emit a low growling/whirring sound.
     
  3. OP
    OP
    Cassius

    Cassius New Member

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    Darren
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    Cool, thank you for your reply

    I have replaced the bearing and will test it out today
     
  4. OP
    OP
    Cassius

    Cassius New Member

    First Name:
    Darren
    Vehicle(s):
    S550 Mustang GT
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    Just for everyone's info, replaced hub bearing and noise is gone - phew!!!
     
    ThatBigSkeptic likes this.
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