Vehicle Loading - Ford 750 2009 Owner's Manual

Driving
To upshift the axle and shift the transmission, move the control switch
to a faster ratio and make the transmission shift in the usual manner.
Ratio extender use
Low End
A two-speed axle can be used as a ratio-extender when split shifting is
not necessary. For low end use, just shift the axle into LO to start out,
and shift to HI when the extra torque is no longer needed.
Transmission
(5-speed)
Two-speed axle
High End
To use the two-speed axle as a high end ratio-extender, stay in the LO
range for normal upshifts and only shift the axle to HI on the freeway for
greater road speed.
Transmission (5-speed)
Two-speed axle
MAXIMUM VEHICLE LOADING
Every vehicle manufactured by Ford Motor Company is supplied with
information on the Safety Compliance Certification Label, located on
either the B-pillar or the driver's door edge, listing the maximum loading
for the vehicle (GVWR), and its axle systems (GAWR) at the tire to
ground interface.
136
2009 F-650/750 (f67)
Supplement
USA (fus)
1st 1st 2nd 3rd
Axle Axle high
low
1st 2nd 3rd
Low for gradeability
4th 5th 6th
4th 5th 6th
Speed
Axle
high