GaPony

Just bought an 05. It has a Steeda Tri-Ax shifter that the previous owner put in. He is a mechanic for Goodyear so I assume he knew what he was doing when he did the intall. I know these shifters transmit more noise than the stock but this one actually will chatter at certain speeds in every gear. I can feel it if I have my hand on the shfter and can kind of make it stop if pull/push it around. Its not real noticeable to most people but it drives me nuts. The two upper most bolts on the shifter extension are tight. Any thoughts?