Tongue Weight (TW)
The TW is the downward force exerted on the hitch ball
by the trailer. In most cases, it should not be less than 10%
or more than 15% 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 vehicle. These kindsof 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 system works by applying lever-
age 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 directions, it pro-
vides for a more level ride, offering more consistent
steering and brake control thereby enhancing towing
safety. The addition of a friction / hydraulic sway control
also dampens sway caused by traffic and crosswinds and
contributes positively to tow vehicle and trailer stability.
Trailer sway control and a weight distributing (load
equalizing) hitch are recommended for heavier Tongue
Weights (TW) and may be required depending on vehicle
and trailer configuration / loading to comply with Gross
Axle Weight Rating (GAWR) requirements.
338 STARTING AND OPERATING
TOWING A DISABLED VEHICLE
This section describes procedures for towing a disabled vehicle using a commercial wrecker service.
Towing ConditionWheels OFF The
Ground AUTOMATIC TRANSMISSION MANUAL TRANSMISSION
Flat Tow NONEIf transmission is operable:
•
Transmission in NEUTRAL
• 30 mph (48 km/h)max speed
• 15 miles (24 km) maxdistance If transmission is operable:•
Transmission in NEUTRAL
• 65 mph (104 km/h)max
speed
Wheel Lift or Dolly To w Front
NOT ALLOWED NOT RECOMMENDED
Rear NOT RECOMMENDED NOT RECOMMENDED
Flatbed ALL BEST METHOD BEST METHOD
Proper towing or lifting equipment is required to prevent
damage to your vehicle. Use only tow bars and other
equipment designed for the 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 applying to
vehicles under tow must be observed.
If you must use the accessories (wipers, defrosters, etc.)
while being towed, the ignition must be in the ON/RUN
position, not the ACC position.
6
WHAT TO DO IN EMERGENCIES 381