freightliner S2 Operator's Manual page 74

Transmission
PB (Auto-Apply Parking Brake, optional
on 2000 Series)
The auto-apply parking brake places the transmis-
sion in neutral and applies the parking brake.
R (Reverse)
Reverse is used to back the vehicle. When the selec-
tor is in reverse, the reverse warning signal will
sound. Always bring the vehicle to a complete stop
before shifting from a forward range to reverse, or
from reverse to a forward range.
Do not idle in reverse for more than 5 minutes. When
time at idle exceeds 5 minutes, select N (neutral), or
if so equipped, P (park) or PB (auto-apply parking
brake).
NOTE: The shift into reverse may not succeed if
a range inhibitor is active. Check for illumination
of the RANGE INHIBIT indicator.
N (Neutral)
The neutral position places the transmission in neu-
tral. When neutral is selected, the vehicle service
brakes, parking brake, or emergency brake must be
applied. Selecting neutral does not apply vehicle
brakes unless an auxiliary system to apply the park-
ing brake is installed.
This position is used when starting the engine and
for stationary operation. It is also used to shut down
the vehicle when P (park) or PB (auto-apply parking
brake) are not available on the shifter. In this case,
the parking brake must be applied.
Do not let the vehicle coast in neutral. If the vehicle
is allowed to coast in neutral, the engine brake will
not work and the driver could lose control of the ve-
hicle.
D (Drive)
In the drive position, the transmission will initially go
into first range when drive is selected. As vehicle
speed increases, the transmission will upshift auto-
matically through each available range up to fourth or
fifth range. As the vehicle slows, the transmission will
downshift automatically.
When going downhill, downshift to a lower transmis-
sion range to increase engine braking and to help
maintain control. The transmission has a feature to
prevent automatic upshifting above the lower range
10.3
selected. However, during downhill operation, the
transmission may upshift to the next higher range, if
the engine is exceeding its governed speed in the
lower range.
NOTE: The shift into drive may not succeed if a
range inhibitor is active. Check for illumination
of the RANGE INHIBIT indicator.
3 and 2 (Third and Second Ranges)
Use the third or second range for heavy city traffic
and for braking on steeper downgrades.
L (Low Range)
Use low range when pulling through mud or deep
snow, when maneuvering in tight spaces, or when
driving up or down very steep grades. Low range
provides the vehicle with its maximum driving torque
and maximum engine braking effect.
NOTE: To have the transmission select these
ranges automatically, leave the selector lever in
D (drive).
Operating Instructions, 3000 Series
The Allison 3000 series transmission is electronically
controlled and comes with a push-button shift control
that provides five or six forward ranges and one re-
verse range. The push-button shift selector has R
(reverse), N (neutral), and D (drive) ranges, up and
down arrows, a mode button, and a digital display.
See Fig. 10.2.
R (Reverse)
Press the R button to select reverse. The digital dis-
play will show R when reverse is selected. Always
bring the vehicle to a complete stop and let the en-
gine return to idle before shifting from a forward
range to reverse, or from reverse to a forward range.
NOTICE
Extended idling in reverse may cause transmis-
sion overheating and damage.
Do not idle in reverse for more than 5 minutes. Se-
lect neutral when time at idle exceeds 5 minutes.
NOTE: The shift into reverse may not succeed if
a range inhibitor is active. When reverse is se-
lected, always be sure that R is not flashing.