I Am Getting A Rattling Type Buzzing Sound When Accelerating Or Decelerating That Sounds Like Exhaust Noise But Is Not. Noise Only Happens When In Gear On Accel Or Decel. Vehicle Runs And Idles Perfect. It Does Not Matter What Gear It Is In. When You Rev Motor When Not It Gear No Noise Is Present. I Had Dc Headers On The Vehicle That Were Cracked So I Put To Stock Manifold Back On With All New Gaskets And Also A New Cat And It Seem To Have Gotten Worse Over Time. I Really Don't Think It Is Exhaust Related. I Really Need To Get Chassis Ears On This Because I Can Only Duplicate This When Driving. I Hope It Is Not A Bearing In The Trans! Yikes!