TOE-OUT ON TURNSSteering feature that turns
the inside wheel more sharply than the outside
TORQUE CONVERTERFluid coupling that acts
as a clutch on an automatic transmission.
torque achieved by turning the impeller of a torque
converter faster than the turbine.
TORQUE TUBEA solid steel drive shaft enclosed
in a hollow tube with a single swivel joint at the
TORSION BARSpring steel rod that operates by
twisting and untwisting.
TORSION SPRINGSSmall coil springs that help
absorb the shock and vibration that occur when the
TRACKINGThe position or direction of the front
wheels in relation to the rear wheels.
TRACK RODMetal rod used to prevent axle side-
to-side movement when cornering.
TRAM GAUGEInstrument used to compare
distances between the front and rear set of tires for
TRANSAXLEA combination of transmission and
differential in one case, used on front-wheel drive
T R A N S A X L E D I F F E R E N T I A LTransaxle
assembly that transfers torque to the driving
wheels and allows them to rotate at different
section of the transaxle, housing the forward and
TRANSAXLE INPUT SHAFTMain shaft that
turns the gears in a transaxle.
TRANSAXLE OUPUT SHAFTShaft
transfers power to the ring and pinion gears of the
TRANSFER CASEA power takeoff unit that sends
power to both the front and rear axle assemblies on
a multiwheel drive vehicle.
TRANSISTORTiny electronic component that
functions as a switch, but has no moving parts.
surrounding and supporting the transmission.
TRANSMISSION COOLERA small separate
radiator, used to cool transmission oil in vehicles
pulling heavy loads.
connects the shift lever with the transmission shift
TRANSMISSION OIL COOLERSmall
within the radiator, used to regulate transmission
TRIGGER WHEELRotating component with one
tooth for each cylinder.
TRIPOD CV-JOINTConstant velocity joint used
on front-wheel drive vehicles, consisting of a
spider and ball arrangement inside a housing.
TUBELESSA tire that does not have a separate
inner tube to hold air.
TURBINEThe driven fan in a torque converter.
TURNINGTem, usually used for machining a
brake drum or rotor, since this process is carried
out on a lathe.
TURNING RADIUS GAUGEInstruments
measure how many degrees left or right the front
wheels are turned.
U-JOINT ALIGNMENT MARKSScribed marks
made on U-joint components before disassembly,
allowing the joint components to be reassembled
in the same positions to avoid possible imbalance
UNDER INFLATIONOperating tires with a lower
than recommended air pressure.
UNIBODYA vehicle structure in which the body
and frame are one unit.
UNIVERSAL JOINTA flex joint allowing limited
up-and-down and side-to-side movement.
UNSPRUNG WEIGHTThe weight of the vehicle
parts that are not supported by the springs, such as
ignition distributor that uses intake manifold
vacuum to advance the timing of the spark to the
modulates, or changes, the main-line hydraulic
pressure in an automatic transmission to meet
changing engine loads.