Ford F-450 Automobile User Manual


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2008 ADVANCE TOWING GUIDE
• F-250/F-350/F-450 Super Duty Pickup
• F-350/F-450/F-550 Super Duty Chassis Cab
• Escape
How to Find Your Truck’s Axle Ratio
If you don’t know the axle ratio of your F-Series Super Duty, check
its Truck Safety Compliance Certification Label (located on the
left front door lock facing or the door latch post pillar). Below the
bar code, you’ll see the word AXLE and a two-digit code. Use this
chart to find the axle ratio that corresponds to that code:
2008 F-Series Super Duty Axle Ratios
Non-Limited Slip Limited Slip
Rear Axle Ratio Rear Axle Code Rear Axle Code
3.73 37 3L
4.10 41 4N/4W*
4.30 43 4L
4.88 48 8L
5.38 53 5L
*Wide rear axle on F-350 Chassis cab with Ambulance Package
Metric Conversion – To obtain information in kilograms, multiply pounds by .45;
to obtain information in liters, divide cubic feet by .0353; to obtain information in
centimeters, multiply inches by 2.54.
This advance edition of the 2008 Ford RV
& Trailer Towing Guide provides trailer
towing weights for the listed early-
introduction 2008 models. It is available
only online for the benefit of customers
ordering any of these models prior to the
September printing of the complete Guide,
which will include more detailed
RV and towing information. Until then,
this expanded information may be
accessed through the 2007 RV & Trailer
Towing Guide available online or in printed
form (see your Ford Dealer).
How to Read Charts
Select column with transmission, cab
design, and drive system (4x2 or 4x4)
you prefer. Read down column to find the
trailer weight that can be towed with
engine/axle ratio combinations listed
at left. GCWR column shows maximum
allowable combined weight of vehicle,
trailer and cargo (including passengers)
for each engine/axle ratio combination.
Maximum Loaded Trailer Weight assumes
a towing vehicle with any mandatory
options, no cargo, tongue load of 10-15%
(conventional trailer), or king pin weight
of 15-25% (fifth-wheel trailer) and driver
only (150 pounds). Weight of additional
options, passengers, cargo, and hitch
must be deducted from this weight.
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