The new/updated DMax MUX which should be on the floors end of Feb is going to be the vehicle to be in. As said before using the 4JJ1 3.0 lt motor they have upped the NM to 430, 6 speed boxs, rear diff lock and GPS even in the SX models.
Our 2012 D.Max, lastest shape, has done 120k towing our van which is near 3 ton. We cruise at 95 kph averaging 16lp100.
Done the GRR twice and towed the van to the Cape and the only problem we have had is a blown high light bulb. It is fitted with a DP Chip and exhaust and produces 150 Kw and 450 Nm. The auto boxes used in the Isuzus are the same as in the Toyotas, the new 6 speed will be the same as in the lastest Pardo, the one in ours is the 5 speed which was used in thev100 series and the older model Pardo.