Ford 2010 E-150 Owner's Manual page 184

Tires, Wheels and Loading
GCWR (Gross Combined Weight Rating)/Trailer Weights
Rear
Engine axle
ratio
E-450 Stripped Chassis (158" wheelbase, dual rear wheel)
6.8L 4.56
E-450 Stripped Chassis (176" wheelbase, dual rear wheel)
6.8L 4.56
Maximum trailer weight for all cutaway (E-350 and E-450) vehicles
must be calculated by subtracting the weight of the vehicle (including
incomplete vehicle weight and payload which includes second unit
body weight, cargo and passengers) from the GCW. Otherwise,
maximum trailer weight is 10,000 lb. (4,536 kg).
For high altitude operation reduce GCWR by 2% per 1,000 ft.
(300 meters) elevation.
To determine the maximum trailer weight designed for your particular
vehicle as equipped, follow the section Vehicle loading earlier in this
chapter.
Your vehicle's load capacity is designated by weight, not by volume, so
you cannot necessarily use all available space when loading a vehicle.
Distribute the load so that only 10–15% of the total is on the tongue. Tie
down the load so that it does not shift and change the weight on the
hitch.
Towing a trailer places an additional load on your vehicle's engine,
transmission, axle, brakes, tires and suspension. Inspect these
components carefully after any towing operation.
Do not exceed trailer weight of 5,000 lb (2,268 kg) when towing with
bumper only.
WARNING: Do not exceed the GVWR or the GAWR specified on
the certification label.
184
2010 Econoline (eco)
Owners Guide, 1st Printing
USA (fus)
Maximum Maximum Loaded
GCWR - lb. Trailer Weight -
(kg) lb. (kg)
(14500 GVWR)
20000
10000 (4536)
(9072)
(14500 GVWR)
20000
10000 (4536)
(9072)
Maximum
frontal area of
2
trailer - ft
2
(m )
60 (5.52)
60 (5.52)