My LC200 diesel will shift to 6th on the highway at about 115kmh so long as the highway is not on an incline and I am not towing anything. It's actually a double overdrive. 4th gear is direct drive 1:1 ratio, 5th is overdrive at about 0.75:1 and 6th is the 2nd overdrive at about 0.58:1 This is why the petrol LC200 can't have this particular 6 speed auto because it cannot (like all petrol engines) generate enough torque to drive 6th gear at such high ratios at 1600rpm which is the engine speed at 110kmh. Even in the diesel 6th gear will not be used much. Biing