OPERATOR'S MANUAL

OPERATING THE REAR/DRIVE AXLE STARTING AND OPERATING THE VEHICLE
– 128 – Y53-6027
Medium Duty (R05/09)
• Dirt roads.
• Loose sand, mud, or other rough road conditions.
WARNING! Do not put the differential lock in
the LOCK position while the wheels are spin-
ning freely (slipping), you could lose control
of the vehicle, resulting in death, personal
injuryor property damage. Switch to LOCK
only when the wheels are not spinning.
• Look ahead for wet, muddy, or icy patches on the
road, stop your vehicle and switch to LOCK ahead of
time.
WARNING! Do not operate the vehicle on dry
pavement with the differential locked. This
could lead to an accident, resulting in death or
personal injury. On dry pavement, you will not
be able to steer well with the differential
locked. Lock the differential only when operat-
ing on surfaces with poor traction, such as
wet, slippery roads or loose gravel.
Inter–Axle Differential Lock Operation
WARNING! Do not use the inter-axle differen-
tial lock when travelling downhill or at speeds
above 25 mph (40 km/h). When it is engaged
under these conditions, your vehicle will
exhibit “understeer” handling characteris-
tics. This “understeer” condition will cause
your vehicle to turn less quickly and more
steering effort will be required, which can
cause an accident, resulting in death or per-
sonal injury.
To LOCK the inter-axle differential:
1. Anticipate when you might need increased traction,
slow down to a steady speed under 25 mph (40 km/h)
or stop the vehicle. Do not lock the inter-axle differen-
tial while going down steep grades or traveling faster
than 25 mph, or while wheels are spinning or traction
is minimal; lock it before you encounter these condi-
tions.