Daimler Freightliner Cascadia 2021, Driver Manual

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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 auto-
matically 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 attempt-
ing forward movement.
To disable the ATC, depress the ATC switch (see
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, en-
gine RPM, throttle position, and vehicle load. After
changing loads or powering up, the system needs to
relearn these inputs for the first few shifts to make
the proper adjustments.
Coasting
When coasting to a stop on level terrain, the trans-
mission system may not downshift into the lower
gears. It will select a gear after the throttle is applied.
Transmission Low Air Warning
CAUTION
If the yellow "Caution: Transmission Air Supply
Low" popup appears while the vehicle is in op-
eration, slow down, safely pull the vehicle off the
road, then correct the problem.
Pneumatic controls are used to shift the transmis-
sion. If there is inadequate air pressure, a yellow
caution pop-up will appear and the quality of gear
shifts may be degraded. See
Fig. 17.8. Wait for air
pressure to build before operating the vehicle.
CAUTION
If the red "Warning: Transmission Will Not Shift"
popup appears while the vehicle is in operation,
choose the safest location available to pull the
vehicle off the road. Prepare for the vehicle to be
immobile if the problem cannot be resolved.
If a severe loss of air pressure occurs, a red warning
pop-up will appear and the transmission will not shift.
See
Fig. 17.9.
Transmission Prognostics
The Eaton Ultrashift clutch requires the application of
grease for maintenance.
The Eaton transmission prognostics display can be
found by navigating to the maintenance screens in
the driver display. The screen will state if the Grease
Interval is OK or if grease needs to be added. See
Fig. 17.10.
If the system status cannot be read, the message
"SNA" displays.
Allison Automatic
Transmissions
Refer to the Allison website for additional information:
www.allisontransmission.com .
Automated and Automatic Transmissions
17.10