IC Bus CE Series 2020, Operation And Maintenance Manual

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Operation
To shift out of R (Reverse) or between any other gear range,
first push and hold the gearshift lever button while moving the
selector control to the desired gear range.
When the vehicle is started, the transmissions are designed
to operate in the standard performance mode. Pressing the
MODE button on the shift tower will switch the transmission
to economy mode and illuminate MODE ON in the shift tower
display. Economy mode provides operation at a lower engine
rpm while maintaining adequate performance.
If the engine speed is above idle when a gear is selected with
the shift tower, the vehicle will not launch. To move the vehicle,
the shift tower must be moved to reselect a gear after the engine
comes down to idle.
For further information on the Allison transmission, refer to the
separate
Allison vocational transmission model Operation
Manual .
Allison Generation IV Push-Button Shift Selector
1. Digital display
2. Mode ID
3. Mode button
4. Range selector button (2)
To shift the transmission into R (Reverse) or D (Drive), press the
brake pedal, then press R or D, then release the brake pedal.
To select a lower range when in D (Drive), press the DOWN
arrow button.
To select a higher range when locked in a lower range, press the
UP arrow button.
To place the transmission in N (Neutral), press N.
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