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  • Help! Diagnose Problem

    I have a problem...when im idling at a stop there is a rattling/grinding sound coming from under the car. Around Christmas I ran over a large animal on the freeway...I had the car lifted and checked but nothing was really wrong. it is not an exhaust rattle, my clutch is fine, new trans mounts...the only thing I can think of is something loose with my driveshaft but honestly I have no idea...any suggestions/help to find out what the problem is?

    thanks for the help.
    2011 Ford Raptor SuperCrew
    SVT Beadlock Wheels
    Roush Intake, Corsa Exhaust
    20" and 40" Light Bars

    2000 Camaro Z28
    Stripped Down Drag Car Build

    Project 1999 Camaro Z28


    2009 G8 GT Stryker Blue Metallic-SHEGONE
    Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
    RotoFab Intake, HSRK, Camaro Trans Pan
    ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
    Pat G - 93 Octane Tune
    Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
    CTS-V Calipers, Brembo Pads
    H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
    HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband

    2.55 Lingenfelter Pulley and Injectors waiting to go on!
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  • #2
    Does it do it in gear or nuetral only? Does the engine shake at all does the exhaust move at all. If you arent moving and it is making the noise it has to be your exhaust or engine or trans give us more details to help you out.

    1995 TA Sold. i sure do miss it though.
    1998 Trans Am aka Winter beater

    Comment


    • #3
      It basically does it only when im in neutral...as soon as i go into gear the sound disapears. Its not the exhaust...its too much of a grinding sound then a rattle.
      2011 Ford Raptor SuperCrew
      SVT Beadlock Wheels
      Roush Intake, Corsa Exhaust
      20" and 40" Light Bars

      2000 Camaro Z28
      Stripped Down Drag Car Build

      Project 1999 Camaro Z28


      2009 G8 GT Stryker Blue Metallic-SHEGONE
      Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
      RotoFab Intake, HSRK, Camaro Trans Pan
      ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
      Pat G - 93 Octane Tune
      Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
      CTS-V Calipers, Brembo Pads
      H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
      HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband

      2.55 Lingenfelter Pulley and Injectors waiting to go on!
      sigpic

      Comment


      • #4
        auto or maual trans. clutch in or out?
        in an auto the flexplate could be cracked.
        manual- bad pilot bearing or throw out bearing.
        the driveshaft doesn't move when your stopped so thats not it

        Comment


        • #5
          yea thats what i figured with the driveshaft...its a 5 speed.
          2011 Ford Raptor SuperCrew
          SVT Beadlock Wheels
          Roush Intake, Corsa Exhaust
          20" and 40" Light Bars

          2000 Camaro Z28
          Stripped Down Drag Car Build

          Project 1999 Camaro Z28


          2009 G8 GT Stryker Blue Metallic-SHEGONE
          Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
          RotoFab Intake, HSRK, Camaro Trans Pan
          ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
          Pat G - 93 Octane Tune
          Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
          CTS-V Calipers, Brembo Pads
          H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
          HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband

          2.55 Lingenfelter Pulley and Injectors waiting to go on!
          sigpic

          Comment


          • #6
            Originally posted by s.reef View Post
            It basically does it only when im in neutral...as soon as i go into gear the sound disapears. Its not the exhaust...its too much of a grinding sound then a rattle.
            when the car is in nuteral does the sound change weather the clutch is depressed or not?

            1996 Pontiac Firebird - Blue/Green Chameleon - 3.8L V6 (231ci)
            Totaled & Declared Dead: 08/07/2001 - Rebuilt & Reborn: 08/21/2002

            Comment


            • #7
              Originally posted by gtpson99 View Post
              when the car is in nuteral does the sound change weather the clutch is depressed or not?
              no it does not
              2011 Ford Raptor SuperCrew
              SVT Beadlock Wheels
              Roush Intake, Corsa Exhaust
              20" and 40" Light Bars

              2000 Camaro Z28
              Stripped Down Drag Car Build

              Project 1999 Camaro Z28


              2009 G8 GT Stryker Blue Metallic-SHEGONE
              Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
              RotoFab Intake, HSRK, Camaro Trans Pan
              ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
              Pat G - 93 Octane Tune
              Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
              CTS-V Calipers, Brembo Pads
              H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
              HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband

              2.55 Lingenfelter Pulley and Injectors waiting to go on!
              sigpic

              Comment


              • #8
                how are the engine mounts?
                pop the hood, put it in drive or reverse, hold the brakes,
                give it gas slowly until the tires begin to spin (on dirt) / driveline locks up.
                have someone watch the engine from the each side of the car... look for the engine twisting... very easy to check.
                sigpic
                2004 Cummins 3500 4x4 QCSB Auto, 5" Exh, CAI, 20" GunMetal7s, 35" Goodyears, Fender Flares

                ----------

                03 Z71 Loaded, Bose, Htd leather, etc
                (Sold)
                00 Camaro Z28 M6 T-tops (Sold)
                00 Camaro SS A4 T-tops (Sold)
                99 C5 Corvette M6
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                98 Camaro Z28 A4 Coupe
                (Sold)
                98 Camaro Z28 A4 T-tops
                (Sold)
                96 Cummins 4x4 36lbs boost
                (Sold)

                Comment


                • #9
                  Originally posted by b.lee View Post
                  how are the engine mounts?
                  pop the hood, put it in drive or reverse, hold the brakes,
                  give it gas slowly until the tires begin to spin (on dirt) / driveline locks up.
                  have someone watch the engine from the each side of the car... look for the engine twisting... very easy to check.
                  ill check that out tomorrow...thanks
                  2011 Ford Raptor SuperCrew
                  SVT Beadlock Wheels
                  Roush Intake, Corsa Exhaust
                  20" and 40" Light Bars

                  2000 Camaro Z28
                  Stripped Down Drag Car Build

                  Project 1999 Camaro Z28


                  2009 G8 GT Stryker Blue Metallic-SHEGONE
                  Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
                  RotoFab Intake, HSRK, Camaro Trans Pan
                  ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
                  Pat G - 93 Octane Tune
                  Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
                  CTS-V Calipers, Brembo Pads
                  H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
                  HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband

                  2.55 Lingenfelter Pulley and Injectors waiting to go on!
                  sigpic

                  Comment


                  • #10
                    any other suggestions??
                    2011 Ford Raptor SuperCrew
                    SVT Beadlock Wheels
                    Roush Intake, Corsa Exhaust
                    20" and 40" Light Bars

                    2000 Camaro Z28
                    Stripped Down Drag Car Build

                    Project 1999 Camaro Z28


                    2009 G8 GT Stryker Blue Metallic-SHEGONE
                    Crate LS3, LS9 Cam, LSA Supercharger, Metco Solid Isolator
                    RotoFab Intake, HSRK, Camaro Trans Pan
                    ZL1 HX, ZL1 Fuel Pump, CTS-V Lid, LSA Injectors
                    Pat G - 93 Octane Tune
                    Kooks 1-7/8" Longtubes, High Flow Cats, X Pipe, Solo AxleBacks
                    CTS-V Calipers, Brembo Pads
                    H&R Lowering Springs, Whiteline Bushings, FE3 Struts/Shocks, Camaro 20" Wheels
                    HIDs, LED Conversion, Atari Gauges, Tint, Roof Carbon Fiber Wrapped, Innovative Wideband

                    2.55 Lingenfelter Pulley and Injectors waiting to go on!
                    sigpic

                    Comment

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