Simple tech: Four-wheel drive explained

When we closed last month's discussion on drivetrain layouts, or how the engine's torque reaches the wheels, we introduced the idea of performance and on-demand four-wheel drive systems. Now we delve into them in detail. If you remember, we noted last issue that a hardcore off-roader, like a Mitsubishi Pajero, would have a transfer case which ideally sends equal power to both axles. This is terrific in difficult traction conditions, especially off-road. Soft roaders don't have transfer cases. They increasingly tend to be front-wheel...

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