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Automotive glossary: What is a Differential Lock or Limited Slip Differential?

Definition of Differential Lock: In certain situations it is desirable to restrict or cut off the mutual independence of the driving wheels, caused by the Differential. For example on slick roads or in cross country drive. Where a limited slip differential is mechanism that in a certain measure reduces the de-coupling, a differential lock completely unmakes it, so that the wheels run completely synchronized, as if being connected by a rigid axle. A lock is manually connectible on demand. The locking degree of a limited slip differential is depending on various values like number of revolutions of the wheels and operative torque, nowadays also more and more electronically controlled.

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