Allison Transmission Motorhome Series Operator's Manual page 26

PUSHBUTTON AND LEVER SHIFT SELECTORS
Description of Available Ranges (refer to Figure 7 and Figure 8)
6* Lower ranges provide greater engine braking for going down
5* grades (the lower the range, the greater the braking effect).
4* Occasionally, it may be desirable to restrict automatic shifting to a
3 lower range because of:
2
The pushbutton shift selector arrow buttons access individual
forward ranges. Push the ↑ (Up) or ↓ (Down) arrow for the desired
range. The digital display shows the range chosen. Even though a
lower range is selected, the transmission may not downshift until
vehicle speed is reduced (this prevents excessive engine speed in
the lower range).
1 First-range provides the vehicle with its maximum driving torque
and engine braking effect. Use first-range when:
For vehicles equipped with the pushbutton selector, push the
↓ (Down) arrow until first-range appears in the select window.
* Actual ranges available depend on programming by vehicle manufacturer.
WITH DIGITAL DISPLAY (cont'd)
• Road conditions.
• Load.
• Traffic conditions.
• Etc.
• Pulling through mud and deep snow.
• Maneuvering in tight spaces.
• Driving up or down steep grades.
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