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PUSHBUTTON SHIFT SELECTOR

General Description. The pushbutton shift selector (refer to Figure 9 and

Figure 10) has the following:

• R (Reverse)—Press this button to select Reverse.

• N (Neutral)—Press this button to select Neutral.

• D (Drive)—Press this button to select Drive. The highest forward range

available will appear in the digital display window. The transmission will

start out in the lowest available forward range and advance automatically to

the highest range.

• ↑ (Up) Arrow—Press the ↑ (Up) Arrow when in DRIVE to request the

next higher range. Continuously pressing the ↑ (Up) Arrow will request the

highest range available.

• ↓ (Down) Arrow—Press the ↓ (Down) Arrow when in DRIVE to request

the next lower range. Continuously pressing the ↓ (Down) Arrow will

request the lowest range available.

• MODE Button and Display Mode/Diagnostic Button—This is the same

function as described previously in the LEVER SHIFT SELECTOR

paragraph, MODE Button paragraph.

NOTE: The oil level sensor is a standard feature on Emergency Vehicle

Series transmissions. Fluid level information is displayed after pressing

both the ↑ (Up) and ↓ (Down) arrow buttons simultaneously.

Simultaneously press both buttons again to obtain diagnostic data.

Allison Transmission Emergency Vehicle Series User Manual

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