Creep Mode
Creep mode allows the vehicle to be driven
at a constant speed at engine idle without
pressing the accelerator pedal. This
feature is useful for slow speed
applications where steady vehicle speed is
required. Creep speed can be adjusted by
upshifting and downshifting the
transmission.
Cruise Control
WARNING
DO NOT operate the cruise control
when operating
on road surfaces with
poor traction (wet, icy, or snow cov-
ered roads) or in heavy traffic. Acceler-
ations caused by the normal operation
of the cruise control could cause you
to lose control of the vehicle resulting
in an injury accident.
This transmission system is compatible
with cruise control.
Cruise control functions and features may
vary depending on which engine you have.
For a specific explanation of your cruise
control, see the cruise control or engine
manual included with your vehicle. This
vehicle's electronic system will perform a
‘rationality check’ every time the vehicle is
started. This check is to ensure that the
service brakes are working before allowing
cruise control to function. This safety
feature is designed to ensure that a driver
is able to cancel the cruise set speed by
using the service brake pedal. The system
will not allow cruise control operation if it
does not pass the ‘rationality check.’ The
display will prompt you to press the service
brake pedal if it has not been pressed
since the vehicle was turned on.
Engine Underspeed
Protection
The transmission will downshift to prevent
engine lug (driving in high gear at low rpm)
and a potential stall during an engine
underspeed condition.
Engine underspeed protection is active
when in Drive or Manual mode.
Engine Overspeed
Protection
The transmission will upshift to prevent an
engine overspeed condition.
Engine Overspeed Protection is active in
Drive, Manual, and Low modes.
High-range Reverse (PRO
only)
This transmission supports operation in
three high-range reverse gears (R4-R6)
providing the higher reverse operating
speeds useful for certain vehicle
applications. See Reverse Mode on page
28.
NOTE
The minimum and maximum manual
reverse starting
gear can be adjusted
at a PACCAR Powertrain distributor.
FEATURES - Creep Mode
Y53-1349-1A1 (02/2022) 15
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