Simple Tech: Types of differentials explained

If you read Simple Tech last month you know that simple (aka open) differentials allow the two wheels on one axle to rotate at different speeds which is critical for changing direction.

However, an open differential ignores the actual difference in the rotation of the two wheels and sends equal torque to both. Sort of like a mum who keeps trying to feed both her kids without taking note of their appetites. Torque is only useful if the wheel has…