Looks like it is raining Class C Expedition Vehicles

With a 4 wheel drive, you can get stuck much farther from a paved road than a 2WD. (I read that in a magazine a few years ago) I guess the idea is to take it to places with reasonable roads to drive on. The locking rear axle will provide some extra traction, and reasonable fuel mileage. You do pay a penalty when installing 4 wheel drive, if you don't need it. An extra 400 pounds and extra complications to the drive system cost about 10% in fuel economy.

Fred.