CHRYSLER gave us a virtually all-new Grand Cherokee in 1999. It may have looked surprisingly like the outgoing model but, according to Jeep, there are no significant carry-over parts. What it does have, at the top end of the family tree, is a muscular 4.7-litre V8 and a very clever four-wheel drive system that looks close to impossible to stop. But like most big 4WDs, it is thirsty and generally uncommunicative, in terms of driver feel, on the road.