3.
Release the throttle pedal. The vehicle will
continue moving at governed low engine idle
speed.
Exiting Creep Mode
To exit Creep Mode, apply the throttle pedal to
accelerate temporarily, or select a higher gear in
Manual Mode. (Creep Mode can be resumed in the
selected gear by releasing the throttle pedal.)
NOTE: The transmission will exit Creep Mode if
the engine lugs 150 rpm below the governed
low engine idle speed. In this case, a lower gear
should be selected if available.
Hill Start Aid
Eaton transmissions are equipped with a Hill Start
Aid (HSA) feature to prevent the vehicle from rolling
while on grades steeper than 3 percent and allow for
a controlled launch. A grade sensor is used to
determine when to engage the feature.
HSA is ’on’ by default. It can be turned off by
pressing and releasing the override switch on the
dash (see
Chapter 4). HSA will turn back on after
the first successful launch.
When the vehicle is stopped on a grade greater than
3 percent and in a forward mode or reverse, depress
the service brakes then release them. The vehicle
will begin to move after 3 seconds, and the clutch
will perform partial engagements to slow the vehicle
motion. Either step on the brake or apply the throttle
to continue negotiating the grade.
Engine Overspeed Protection
The system will upshift if necessary to prevent
engine overspeed in Drive, Manual, and Low.
Shuttle Shifting
Shuttle shifting from reverse to any forward mode is
only allowed if the vehicle speed is approximately
zero.
Auto Start Gear Selection and
Override
The transmission uses various inputs to automatically
select the best start gear in Drive and Manual. This
selection can be changed using the shift control;
however, if the selection requested could cause
damage or engine lugging, the request will be denied
and a tone will sound.
Skip Shifting
When appropriate, the transmission may skip shift in
Drive. When prevailing conditions like load and grade
allow, skip shifts can be performed in Manual mode
using the SmartShift control.
Auto Neutral
An Eaton automated transmission system will
automatically shift to neutral if the vehicle is left in
Drive and the parking brake is set. ’AN’ will show on
the gear display. To re-engage the transmission,
select Neutral and then either Drive or Reverse on
the shift control (it will re-engage regardless of
whether the parking brake is released).
Automatic Traction Control
An Eaton automated transmission system requires
the Automatic Traction Control (ATC) option to be
enabled when driving in soft soil/sand to prevent
wheel slippage and shifting issues.
With the ATC enabled, the system will engage the
brakes on the wheel or side that the wheel slip is
occurring to help the vehicle gain traction. The point
at which the traction control will actuate the braking
system increases with throttle: low throttle allows the
system to brake the wheels earlier; heavy/full throttle
raises the point of the acceptable wheel slip.
Adhere to the following points when driving with ATC
enabled:
•
If using Automatic mode in soft soil and/or
sand, maintain the engine speed between
1000 and 1300 rpm to prevent unnecessary
upshifting.
•
If using Manual mode in soft soil and/or sand,
do not attempt an upshift and try to maintain
the current gear.
•
If the vehicle comes to a stop in the sand it
may be necessary to back up prior to
attempting forward movement.
To disable the ATC, depress the ATC switch, shown
in
Chapter 4. This mode allows for the drive axle
wheels to spin.
Load-Based Shifting
An Eaton automated transmission system is adaptive
and will change the shift points based on grade,
engine RPM, throttle position, and vehicle load. After
changing loads or powering up, the system needs to
Automated and Automatic Transmissions
14.12
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