Limited-slip differential (LSD)

Eaton, an OE differential maker, defines it as a differential which utilizes some means to partially reduce, but not totally eliminate, individual wheel spin, using clutches, springs or biasing pinion gears. The contrast is with an open differential, which Eaton describes as simply allowing for individual wheel rotation speeds during cornering. An LSD still permits the speed difference cornering needs; it limits the extreme case.

It is usually an option rather than standard, so whether a specific car has one is a build-sheet question. Chatter or shudder in tight, slow turns is where a worn one tends to announce itself.

On a build sheet, window sticker or axle tag, and in low-speed turning behaviour.

A locker forces both wheels to the same speed; an LSD only limits the difference.