Differential (mechanical device)

A Differential is a mechanical device that allows wheels to rotate at different speeds while receiving equal torque. It's crucial for motor vehicles to navigate corners smoothly, as the outer wheel travels a greater distance than the inner one. Without a differential, the vehicle's wheels could slip, or the drive axle could snap.

Differentials can also provide a gear ratio between the input and output shafts (called the "axle ratio" or "diff ratio"). For example, many differentials in motor vehicles provide a gearing reduction by having fewer teeth on the pinion than the ring gear.