ALLISON-OM1334EN
ALLISON AT, MT, HT SERIES ON-HIGHWAY TRANSMISSIONS
OPERATOR'S MANUAL
2000
ALLISON-OM1334EN - Page 11 of 48
6
ALLISON AUTOMATICS
Typical AT, MT, HT Shift Selector Positions
When your vehicle is equipped with an Allison automatic, it is not necessary to select
the right moment to upshift or downshift during the changing road and traffic
conditions. The Allison automatic does it for you. A knowledge of the ranges available
at your shift selector will make control of the vehicle and your job even easier.
When the shift selector has no
P
(Park) provision, always put the selector in
N
(Neutral) and apply the parking brake (or service brakes if the vehicle is not
equipped with a parking brake) to hold the vehicle when it is unattended and before
turning off the engine.
*
Available on AT 500 Series and AT 1500 Series models
only
(refer to Page 7).
+ This position not present on models with
P
(Park).
** Optional.
◊
Without second gear start.
AT 500
Series And
AT 1500
Series
MT 640,
MT(B) 643,
MT 643R,
MT(B) 644
◊
,
MT(B) 647
MT 650,
MT(B)
653DR
HT 740,
HT 747
HT 750CR,
HT 754CR,
MT(B) 654CR
◊
HT 750DR
(DR DB)
Park
—
—
—
—
—
Reverse
Reverse
Reverse
Reverse
Reverse
Reverse
Neutral
Neutral
Neutral
Neutral
Neutral
Neutral
1–4
1–4
2–5
1–4
1–5
2–5
1–3
1–3
2–4
1–3
1–4
2–4
1–2
+
1–2
2 (2–3**)
1–2
1–3
2–3
1
1
1
1
1–2
2
———
— 1
1
(Pages 7-10)
(Pages 9-10)
(Pages 11-12)(Pages 9-10)
(Pages 13-14)
(Pages 15-16)
P*
R
N
V01959
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