How does a locked differential function?

• A. It allows wheels to rotate at different speeds
• B. It ensures both wheels rotate at the same speed
• C. It activates only when slowing down
• D. It distributes power based on traction control

Answer: (B)

A locked differential is designed to ensure both wheels on an axle rotate at the same speed. This functionality is particularly important in off-road and low-traction situations, as it prevents one wheel from spinning freely while the other remains stationary. When the differential is "locked," the torque provided by the engine is distributed equally to both wheels, allowing vehicles to navigate through difficult terrain where traction can vary significantly between wheels.

In scenarios where one wheel may slip due to mud, ice, or uneven surfaces, a locked differential maintains momentum by forcing both wheels to work together. This is particularly advantageous in maintaining vehicle control and stability, ensuring that all available traction is utilized effectively.

While other options touch on aspects of vehicle dynamics, they do not accurately reflect the core purpose of a locked differential. For example, allowing wheels to rotate at different speeds is a function of an open differential, not a locked one. Similarly, the activation of the locked differential is not contingent on the speed of the vehicle but rather on whether traction is compromised. Finally, while power distribution in certain conditions may involve traction control, this does not directly relate to the primary function of a locked differential, which is to equalize wheel speed.