Operation, Allison
- Start the engine, then check the digital display on the "push button shift selector." Under "Select" at the top of the unit, the display should always show the "primary" shift mode. Under "Monitor," the gear the transmission is in should be displayed.
- Use reverse (R) to back the vehicle. Completely stop the vehicle before shifting from a forward gear to reverse or from reverse to forward. There is only one reverse gear.
- Select drive (D) for all normal driving conditions. The
vehicle will start out in 1st gear, and as speed increases, the transmission
will upshift through each gear automatically. As the vehicle slows
down, the transmission will downshift to the correct gear automatically.The pressure of your foot on the accelerator pedal influences the automatic shifting. When the pedal is fully depressed, the transmission will automatically upshift near the governed speed of the engine. A partially depressed position of the pedal will cause the upshifts to occur at a lower engine speed.
- Occasionally the road, load, or traffic conditions make
it desirable to restrict the automatic shifting to a lower range.
The lower the gear range, the greater the engine braking power.Use the up or down arrow buttons on the shift selector to reach the desired gear. The "Select" indicator will display your choice, and the "Monitor" indicator will show the selected gear once it is reached.
- Use neutral (N) and apply the parking brake when the vehicle
is parked with the engine running.
Caution: Do not allow the vehicle to coast in neutral. This can result in severe transmission damage. Also, no engine braking is available.
Caution: The engine should never be operated for more than 30 seconds at full throttle with the transmission in gear and the output stalled. Prolonged operation of this type will overheat the transmission fluid and will result in severe damage to the transmission.
Warning: Never shift from neutral (N) to drive (D) or reverse (R) at engine speeds above idle. The vehicle will lurch forward or backward, which could cause property damage and personal injury.
Note: In the lower gear ranges, the transmission will not upshift above the highest gear selected unless the engine governed speed is exceeded.