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Note: Do not shift the axle to LO range with the vehicle in motion.
Split-shifting (combined axle and transmission shift - manual
transmissions only)
Split-shift sequence
Ratio
combination
1234567891011
Transmission
gear
1st 1st 2nd 2nd 3rd 3rd 4th 4th 5th 6th 6th
Axle range LO HI LO HI LO HI LO HI LO LO HI
To downshift the axle to a slower ratio and shift the transmission, shift
the transmission and move the control switch to the lower ratio before
the clutch is re-engaged.
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 the LO to start
out, and shift to HI when the extra torque is no longer needed.
Transmission
(5-speed)
1st 1st 2nd 3rd 4th 5th 6th
Two-speed Axle Axle
Low
Axle High
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) 1st 2nd 3rd 4th 5th 6th
Speed
Two-Speed Axle Low for Gradeability Axle
High
MAXIMUM VEHICLE LOADING
Every vehicle manufactured by Ford Motor Company is supplied with
information on the Vehicle Rating Decal listing the maximum loading for
the vehicle (GVWR), and its axle systems (GAWR) at the tire to ground
interface.
2006 F-650/750 (f67)
Supplement
USA (fus)
Driving
136
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