All-wheel-drive vehicles split power to the front and rear axles using a Center differential. Which option correctly identifies its function?

• A. Distributes power between front and rear axles
• B. Allows slight speed differences between front and rear axles while enabling overall torque distribution
• C. Locks the front and rear axles together during acceleration
• D. Provides lubrication between the axles

Answer: (B)

The center differential's job is to let the front and rear axles spin at slightly different speeds while still sharing engine torque. In a turn, the front and rear wheels travel at different rates, and a fixed drive connection would cause windup and binding. The center differential accommodates that speed difference and distributes torque to both axles as needed for traction. That’s why the correct description is that it allows slight speed differences between front and rear while enabling overall torque distribution. It does not lock the axles together, and lubrication isn’t its function.