Unusual Rear Axle Noise

Discussion in 'Boss 302 and S197 Technical Forum' started by Theviking, Sep 12, 2017.

  1. Theviking

    Theviking TMO Intermediate

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    After my last track day/weekend I started experiencing a rear axle noise that sounded much like a brake pad dragging on the rotor. But it's not the brakes and it sounds like it coming from the differential. Perhaps it's the pinion bearing but I'm not familiar with the signs of failure here.

    The only change I made prior was adding a GT500 diff cover and changing out the fluid. I'm going to pull the cover, check for metal and change out the fluid. The car also has a 1-piece driveshaft and the rear is lowered about 1 1/2" but not sure if this would cause any excessive load/wear on the diff somehow. Opinions appreciated.
     
    Last edited: Sep 12, 2017
  2. Grant 302

    Grant 302 OPM Spent: $247,855 Moderator

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    Did you add the friction modifier?
     
  3. Theviking

    Theviking TMO Intermediate

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    I did but going to dump the fluid, start over, and see if it helps. Just not sure where to go next if that doesn't help. Thanks.
     
  4. Grant 302

    Grant 302 OPM Spent: $247,855 Moderator

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    Might need rebuilding. I probably need to do mine on the FakeR soon too, or do the Torsen upgrade.
     

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