lateral link: a suspension link that is aligned to resist sideways motions in a wheel.
leading link: a suspension link that is aligned to resist longitudinal motions in a wheel; it is mounted to the chassis behind the wheel.
leaf spring: a long, flat, thin, flexible piece of spring steel or various composite materials that deflects by bending when forces act upon it. Leaf springs are used primarily in suspensions.
lift: a vertical force directed upward, produced by the airflow around a moving object: such as a car body.
lift-throttle oversteer: a handling characteristic that causes the rear tires to lose some of their cornering grip when the throttle is released during hard cornering.
limited-slip differential: a differential fitted with a mechanism that limits the speed and torque differences between its two outputs. Limited slip ensures that some torque is always distributed to both wheels, even when one is on very slippery pavement.
line: The path through a corner that best accommodates a late braking point, a high cornering speed, and the fastest-possible exit speed out of a corner.
link: a suspension member that has a single joint at each end.
live axle: a rigid axle incorporating a differential and axle shafts to power the two wheels it is supporting.
lockup: the juncture at which a tire starts to skid during braking. A tire's maximum braking force is developed when it is on the verge of lockup, so a car's shortest stopping distances are produced when its front and rear tires approach lockup simultaneously. This is very hard to achieve under varying conditions of load and traction, so one end typically locks up before the other. Front-wheel lockup is inherently more stable than rear-wheel lockup.
lockup differential: a differential whose two outputs can be locked together, eliminating any differential action but maximizing traction under slippery conditions.
lockup torque converter: a torque converter fitted with a lock-up clutch that can be engaged to eliminate the slip between the torque converter's input and output, thereby improving fuel efficiency and performance.
loose: a slang term for oversteer.