ABSAn abbreviation for "anti-lock braking
ABS SWITCHSensor that monitors hydraulic
system pressure and controls the pump motor in an
AC Alternating current.
alternating current; an alternator.
ACTUATOR A device that performs an action or
outputs a signal in response to a signal from a
AIR BRAKESVehicle brakes actuated by air
AIR COMPRESSOR A pump that forces air, under
pressure, into a storage tank.
ALTERNATORAn ac generator.
ALTERNATOR BEARINGNeedle- or ball-type
bearings used to provide a low friction surface for
AMMETERAn electric meter that measures
current, in amperes, in an electric circuit.
AMPEREA unit of electric current flow
ANTI-LOCK BRAKE COMPUTERECM
accepts wheels sensor inputs and controls braking
of the vehicle.
brakes that will not "lock" and permit the wheels
designed to keep brake pads from vibrating and
ANTI-SKID SYSTEMAnother name for anti-lock
windings in a motor.
ASPECT RATIOThe relationship of tire height to
width or profile.
that does not have to be shifted manually.
AUTOMATIC TRANSMISSION FLUIDOil
with special additives to make it compatible with
friction clutches and bands.
AUTOMOTIVE CLUTCHA mechanical device
used to connect and disconnect a manual
transmission from engine power.
AXLE A cross support on a vehicle on which
supporting wheel, or wheels, turn(s).
AXLE END PLAYIn-and-out movement of the
axle, adjusted to specification by using shims.
AXLE SHAFT RETAINERDevices that attach to
the outside of an axle housing to prevent the axles
from sliding out.
AXLE SHIMSUsed between the axle housing and
retainer to limit end play of the axle.
BACKLASH The backward rotation of a driven
gear that is permitted by clearance between
meshing teeth of two gears.
BACKING PLATEA component that holds the
shoes, wheel cylinder, and other parts inside a
BACKUP LIGHT SWITCHAn electrical switch
that completes a circuit to the backup lights
whenever the reverse gear is engaged.
BALL JOINTSwivel joint that provides free
movement for the steering knuckle and control
BALL SOCKETSComponent that allows motion
in up-and-down and side-to-side directions.
BANDMetal strap with frictional material lining
that can clamp a clutch drum in an automatic
transmission to stop its rotation.
tightness of automatic transmission bands as
necessary for proper operation.
BATTERY A device consisting of two or more cells
for converting chemical energy into electrical