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You may go further and think the
tongue weight should be limited
to less than 1,000 lbs (454 kg) to
avoid exceeding GVWR. But the
effect on the rear axle must still be
considered. Because the rear axle
now weighs 3,100 lbs (1 406 kg),
900 lbs (408 kg) can be put on
the rear axle without exceeding
RGAWR. The effect of tongue weight
is about 1.5 times the actual weight.
Dividing the 900 lbs (408 kg) by 1.5
leaves only 600 lbs (272 kg) of
tongue weight that can be handled.
Since tongue weight is usually at
least 10 percent of total loaded trailer
weight, expect that the largest trailer
the vehicle can properly handle is
6,000 lbs (2 721 kg).
It is important that the vehicle
does not exceed any of its
ratings — GCWR, GVWR, RGAWR,
Maximum Trailer Rating or Tongue
Weight. The only way to be sure it is
not exceeding any of these ratings is
to weigh the vehicle and trailer.
Total Weight on the Vehicle’s
Tires
Be sure the vehicle’s tires are
inflated to the upper limit for cold
tires. These numbers can be found
on the Certification/Tire label. See
Loading the Vehicle on page 4-16.
Make sure not to go over the GVW
limit for the vehicle, including the
weight of the trailer tongue.
Hitches
It is important to have the correct
hitch equipment. Crosswinds, large
trucks going by and rough roads are
a few reasons why the right hitch is
needed. Here are some rules to
follow:
• The rear bumper on the vehicle is
not intended for hitches. Do not
attach rental hitches or other
bumper-type hitches to it. Use
only a frame-mounted hitch that
does not attach to the bumper.
• Will any holes be made in the
body of the vehicle when the
trailer hitch is installed? If there
are, then be sure to seal the holes
later when the hitch is removed.
If the holes are not sealed, dirt,
water, and deadly carbon
monoxide (CO) from the exhaust
can get into the vehicle. See
Engine Exhaust on page 2-30.
Driving Your Vehicle 4-29