FRAMEThe strong steel structure that supports the
body of the vehicle.
FRONT DRIVE AXLESShafts that transfer power
from the transaxle differential to the wheels of the
FULLY SYNCHRONIZED TRANSMISSION
One in which all forward gears are equipped with
synchronizers to allow downshifting while in
FUSEA device that interrupts current if a circuit is
overloaded or a short occurs.
FUSE BLOCKA boxlike unit that holds the fuses
for the various electric circuits in a vehicle.
FUSIBLE LINKA type of circuit protector in
which a special wire melts to open the circuit when
current is excessive.
GEAR BACKLASHSmall amount of clearance
between meshing gear teeth.
cleaning, adjusting, and replacing parts as
GEARBOX RATIOThe relationship (number of
turns) between the steering wheel and the sector
GEAR CLASHNoise that is heard when gears fail
to mesh properly in a manual transmission.
GEAR OILA high viscosity oil (80W or 90W) used
for manual transmissions and differentials.
GEAR RATIOThe number of rotations a driving
gear must make while the driven gear is
completing one revolution.
GEAR REDUCTIONThe situation in which a
small gear is used to drive a larger gear with an
increase in torque as a result.
GRABBING BRAKESAbrupt, hard application of
brakes when the brake pedal is slightly depressed.
GREASE SEALComponent that prevents lubricant
leaking from the axle assembly into the steering
knuckle or bearing support.
GROUNDThe return path for current in an
armatures for shorts.
HALL EFFECTA type of pickup used with many
electronic ignition systems.
HALOGEN LAMPOne with a small, high
intensity halogen lamp inside a conventional
HARD STEERINGGreater than normal effort
required to turn the steering wheel.
HARD TO SHIFTA manual transmission problem
often caused by damaged or sticking linkage.
HARSH SHIFTSTransmission changes gears in a
battery, switches, fuses, and lamps that make up
the headlamp lighting circuit.
HEADLIGHT AIMERA device used to adjust
headlights to specific positions.
HEADLIGHT AIMING SCREENSet
measured lines on a wall, used to adjust headlight
HEAT SINKA device for absorbing heat from one
medium and transferring it to another.
HORN RELAYA relay connected between the
battery and the horn.
operates a rear axle assembly mounted on springs.
The most common rear wheel drive type.
HOT PLUGA spark plug with a long insulator tip,
often used in older engines.
HUBMounting place for a vehicle wheel on the end
of the axle or spindle.
HYDRAULIC BRAKE BOOSTERBraking
system booster actuated by hydraulic pressure
from the power steering pump.
HYDROMETERTool used to test for specific
gravity (and thus, battery charge).
IDLER ARMA link that supports the tie rod and
transmits steering motion to both wheels through
the tie rod ends.
IGNITION COILDevice used to produce the high
voltage needed for ignition spark.
ignition timing, based on sensor input.
directs coil voltage to each spark plug at the