Shunt or clunk is inevitable in a manual transmission equiped car. Some more than others. Due to the direct link between the crank and the diff there will always be some form of backlash, whereas an auto equipped car has the dampening effect of the torque convertor. For the amount of kms on my car I think the backlash/noise is acceptable. I'm a mechanic by trade and have heard a few clunky diffs/gearboxes in my experience, and mine is nothing like a clunky diff/gearbox. For the amount of torque going through it I fell as if it is an exceptional piece of engineering. The shift is fast and smoothe. No clunk as it goes in gear. And the throw of the shifter is quite good for a production gearbox. I can't compare it to the previous 6 speed as I haven't driven one, but the box in my car is more than acceptable in my opinion.