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Strange noise...any ideas?

Discussion in '348/355' started by RWP137, Nov 21, 2013.

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  1. RWP137

    RWP137 Formula 3

    Apr 29, 2013
    1,613
    AZ
    Full Name:
    Rick
    #1 RWP137, Nov 21, 2013
    My car (96 GTS manual trans) has a slight knocking noise forward of the dash at lower speeds that seems to be in sync with wheel rotation. Nothing appears to be rubbing on the wheels and when the slightest amount of brake pressure is applied, it goes away. When I let off the brake it comes back. Any help is appreciated...
     
  2. mike_747

    mike_747 Formula Junior

    Dec 15, 2008
    794
    Seattle
    #2 mike_747, Nov 21, 2013
    Just guessing, but I would start at the brake calipers, attachments solid, etc.
     
  3. roadracer311

    roadracer311 Formula 3

    May 6, 2009
    2,398
    San Francisco
    Full Name:
    Paul
    #3 roadracer311, Nov 21, 2013
    I'd check lug nuts too! Pronto!
     
  4. RWP137

    RWP137 Formula 3

    Apr 29, 2013
    1,613
    AZ
    Full Name:
    Rick
    #4 RWP137, Nov 21, 2013
    Just got new tires, watched them torque the lugs. I'm thinking brakes.
     
  5. gothspeed

    gothspeed F1 World Champ

    May 26, 2006
    10,244
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    goth
    #5 gothspeed, Nov 21, 2013
    Lug nuts as mentioned above or loose wheel bearings.
     
  6. gaw111

    gaw111 Formula Junior
    Owner Silver Subscribed

    Sep 24, 2012
    662
    Rainelle WV
    Full Name:
    George Wheeler
    #6 gaw111, Nov 21, 2013
    How good are your brake pads?
     
  7. RWP137

    RWP137 Formula 3

    Apr 29, 2013
    1,613
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    #7 RWP137, Nov 22, 2013
    I think the pads are good, but I'll check them. I didn't think a pad could be loose. If I pull the wheel off, what should I look for?
     
  8. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,792
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #8 plugzit, Nov 22, 2013
    If it goes away with brake pressure, it's likely associated with the rotors and calipers, or possibly wheel bearings.
     
  9. RWP137

    RWP137 Formula 3

    Apr 29, 2013
    1,613
    AZ
    Full Name:
    Rick
    #9 RWP137, Nov 27, 2013
    Problem solved in 20 min. The butterfly clip holding the right front brake pads had the wire running under it, so it wasn't holding the pad down firmly. Thanks Ferrari-tech!!!
     

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