differential compensates for the difference in wheel speeds on the driven axle. The wheels on the driven axle turn at different speeds when the vehicle is cornering and the wheel on the inside of the bend has a shorter distance to cover than the wheel on the outside, causing the outside wheel to turn faster. Compensating for this difference in speeds is generally the task of a bevel differential. A locking differential prevents either wheel from spinning freely, directing the power to the wheel with better grip instead.
The rear axle differential lock allows you to manually lock both differentials on slippery surfaces to transmit 100 percent of the engine torque to the wheel with the best traction (optional equipment).