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  1. Drivetrain Tech
    I've had my '09 GT since July 2009, and always had the annoying vibration at highway speed. I factored out the AFM by putting the tranny in M6. The car is bone stock other than debadging. My dealer offered no solution, had a dismissive attitude, and was not interested in looking into the...
  2. V8 Engine Tech (L76/LS3)
    On our recent trip to Florida I noticed a sound and feel that I hadn't before. If I accelerate moderately to 47-50mph, then let off the gas, or lightly feather the brake, I heard a low boom from the front of the car. I am able to repeat this every time. I put the vehicle into engineering...
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