HOLDEN'S Jackaroo, in its current incarnation, has always been recognised as a particularly competent on-road performer for a big four-wheel drive. Recent upgrades have made the off-road Holden better, the most important change being the availability of an automatic transmission with the rugged turbo-diesel. It is like having your cake and eating it too. There is the solid, workhorse nature of a diesel engine, coupled to the smooth, easy shifting of a state-of-the-art four-speed automatic gearbox.