So.... I decided on the G6, I will look at gettin it past 300. But firstly I want to make sure it's 100% before I start. One thing that im not sure about is the tacho is quite unsteady. For eg. When im sitting on the motorway at 100 the tacho seems to move +/- around 100rpm. Im not sure if its an electrical thing, gearbox or motor. The car seems smooth as. It has a tiny miss at idle. Which doesnt make the tacho move. I thought the torque converter would lock and there be no way the motor could alter its speed. Any thoughts? Thx