ALLISON-OM1334EN
ALLISON AT, MT, HT SERIES ON-HIGHWAY TRANSMISSIONS
OPERATOR'S MANUAL
2000
ALLISON-OM1334EN - Page 13 of 48
8
RAN
GE SELECTION — AT 500 SERIES AND AT 1500 SERIES WITH A
SECOND NEUTRAL (PARK)
(cont’d)
3
2
Occasionally, the road, load, or traffic conditions will make it desirable to
restrict the automatic shifting to a lower range. (When conditions
improve, return the selector to the normal
D
(Drive) position.) These
positions also provide greater engine braking for going down grades (the
lower the range, the greater the braking effect).
1
Use this range when pulling through mud and snow or driving up or down
steep grades. This range provides the vehicle with maximum driving
power and maximum engine braking power.
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