Tongue Weight (TW)
The tongue weight is the downward force exerted on the
hitch ball by the trailer. In most cases it should not be less
than 10% of the trailer load. You must consider this as
part of the load on your vehicle.
Frontal Area
The frontal area is the maximum height multiplied by the
maximum width of the front of a trailer.
Trailer Sway Control
The trailer sway control is a telescoping link that can be
installed between the hitch receiver and the trailer tongue
that typically provides adjustable friction associated with
the telescoping motion to dampen any unwanted trailer
swaying motions while traveling.
Weight-Carrying Hitch
A weight-carrying hitch supports the trailer tongue
weight, just as if it were luggage located at a hitch ball or
some other connecting point of the truck. These kind of
hitches are the most popular on the market today and
they are commonly used to tow small- and medium-
sized trailers.
Weight-Distributing Hitch
A weight-distributing hitch system works by applying
leverage through spring (load) bars. They are typically
used for heavier loads, to distribute trailer tongue weight
to the tow vehicle’s front axle and the trailer axle(s).
When used in accordance with the manufacturer’s direc-
tions, it provides for a more level ride, offering more
consistent steering and brake control and thereby en-
hancing towing safety. The addition of a friction/
hydraulic sway control also dampens sway caused by
traffic and crosswinds, contributing positively to tow
504 STARTING AND OPERATING
TOWING A DISABLED VEHICLE
NOTE:This section describes procedures for towing a
disabled vehicle using a commercial wrecker service.
Towing Condition WheelsOFF The Ground AUTOMATIC
TRANSMISSION MANUAL
TRANSMISSION
Flat Tow NONENOT ALLOWED Trans in NEUTRAL
Dolly Tow RearNOT ALLOWED NOT ALLOWED
Front NOT ALLOWED NOT ALLOWED
Flatbed ALLOKOK
Proper towing or lifting equipment is required to prevent
damage to your vehicle. Use only tow bars and other
equipment designed for this purpose, following equip-
ment manufacturer ’s instructions. Use of safety chains is mandatory. Attach a tow bar or other towing device to
main structural members of the vehicle, not to bumpers
or associated brackets. State and local laws regarding
vehicles under tow must be observed.
6
WHAT TO DO IN EMERGENCIES 551
