same noise happened with my car, but with mine it was a heat shield that vibrated. i installed a short shifter and the noise was gone. the only heat shield i messed with was the one directly underneath the shifter. i had to take it out and bash into the middle of it to make room for the new shifter because the very bottom of it scraped against the heatshield. then made sure the heatshield was on there really tight. if cure #1 doesnt help maybe #2 will? ^^