PULLING BRAKESSituation in which a vehicle
veers to one side when the brakes are applied.
QUICK CHARGE TESTA method of determining
whether battery plates are sulfated (no longer able
to hold a charge).
RACK AND PINION STEERING GEARA
steering gear in which a pinion of the end of the
steering shaft meshes with a rack of gear teeth on
the major cross member of the steering linkage.
RACK AND PINION STEERING GEAR
ADJUSTMENTTightening or loosening rack
adjustment screw as needed for optimum steering.
RADIAL RUNOUTUneven rotation caused by
differences in diameter.
RADIAL TIREOne that has cord plies running
straight across, from bead to bead. Additional
stabilizer plies are placed beneath the tread.
READING SPARK PLUGSDetermining cause of
a problem by examining condition of the spark
suspension, and other problems through the wear
patterns on tire treads.
REAR AXLE ASSEMBLYA combination of
gears and axles converting rotary motion of the
drive shaft to forward or backward motion of a
REAR AXLE RATIOThe relationship between
the numbers of teeth on the pinion gear and ring
gear. Ratio affects acceleration, pulling power,
and fuel economy.
REAR DRIVE AXLE ASSEMBLYDifferential,
axles, and other components transferring power
from the drive line to the rear wheels.
REAR DRIVE AXLESThe components that
transmit power from the differential gears to the
RECIRCULATING BALLMost common type of
gearbox used with linkage steering system.
RECTIFIED Term used to describe ac current that
has been changed to dc.
REDUCTION STARTEROne that uses extra
gears to increase the torque applied to the flywheel
REGULATOR BYPASS TESTTest that connects
full battery voltage to the alternator field, leaving
the regulator out of the circuit.
REGULATOR VOLTAGE TESTTest
charging system under low output, low load
RELAY Electrically operated switch.
RESERVE CAPACITY RATINGThe amount of
time a battery will continue to provide as
acceptable current flow when not being recharged
by the alternator.
remaining between pedal and floor when the
brakes are applied.
RESISTANCE Opposition to current flow.
RESISTANCE PLUG WIRESpecial type of spark
plug wire that eliminates most radio interference.
RETRACTING AND HOLD-DOWN SPRINGS
Springs that pull the shoes away from the brake
drum surface when the pedal is released.
REVERSE BIASArrangement in which a diode
acts as an insulator.
REVERSE IDLER SHAFTShaft in a manual
transmission on which the reverse idler gear is
connection of primary wires.
RING AND PINION BACKLASHThe amount of
space between the meshing gear teeth.
RING AND PINION NOISEWhining or howling
sounds that change pitch with speed change,
usually cause by wear or damage to differential
RING GEARLarge gear in the differential that is
driven by the pinion gear and, in turn, drives the
RING GEAR RUNOUTThe amount of wobble
that occurs as the gear rotates.
amount of resistance that is generated as a tire rolls
on the road surface.
ROTORA rotating contact inside the distributor
that routes electrical pulses from the coil to the
spark plugs. Also, the metal disc against which
brake pads are forced to stop a vehicle.