Rack and Pinion Steering
A steering gear in which a pinion on the end of the steering shaft
merges with a rack of gear teeth on the major cross member of the
steering linkage. When the steering wheel is turned, the pinion
gear turns, moving the rack to the left or right, thus steering
A conservative projection of the market value of a vehicle at the
end of a lease. Residual values are provided by major auto manufacturers
or independent companies that specialize in auto valuation.
A higher residual value will lower the monthly payment. However,
the vehicle must be resalable at the residual amount or the lessor
will lose money. Conversely, adjusting the residual too low will
increase the monthly payment and may make the lease payment unattractive.
Adjustments to residual may be made for excess mileage or wear and
A small auxiliary muffler that assists the main muffler in reducing
Any gear set consisting of a small gear (the pinion gear) which
turns a large-diameter annular gear (the ring gear). Used in rear-drive
differentials (rear ends) to transfer power from the driveshaft
to the axle and wheels.
Tire-rolling radius is the distance from the center of the wheel
to the road. Static radium applies when the vehicle is standing
still. Dynamic rolling-radius described wheels in motion. The latter
is used to measure tire revolutions per mile and is usually slightly
higher than static radius.
This is motion resisting force that is present from the instant
the wheels begin to turn. On normal road surfaces, rolling resistance
decreases with increased tire pressure and increases with vehicle
weight. Rolling resistance can also be affected by tire construction
and tread design.
Rotations per minute.