operators_manual

Table Of Contents
Drive Neutral Reverse Selector
Transmission mode is selected by rotating
the lever outer knob. There is a position for
Drive (D), Neutral (N), and Reverse (R).
The Digital Display will indicate the
corresponding mode. See Drive, Neutral,
and Reverse Indicator on page 65 and
Peterbilt Digital Display on page 63.
NOTE
Selector (the transmission) must be in
Neutral (N) to start the truck.
Auto Neutral
Gear Display Icon (Auto Neutral)
AN
The Auto Neutral feature will automatically
shift to Neutral if the vehicle is left in
forward or reverse mode and the parking
brake is set. The driver must then select
the desired forward or reverse mode with
the service brake applied.
Neutral Coast Mode
Neutral Coast Mode allows the
transmission to disengage the driveline by
pulling out of gear on slight downhill
grades, where little to no engine power is
required, when the vehicle is in cruise
control and the transmission is in Drive
mode.
When Neutral Coast Mode is
active, the engine will drop to idle
speed and the transmission will
disengage.
The gear display may flash a gear
number or indicate Neutral when
Neutral Coast Mode is active.
If a flashing number is indicated in
the gear display, this represents the
gear that the transmission will
select when it is necessary to
engage a gear.
The transmission will exit Neutral
Coast Mode and reengage an
appropriate gear under any of the
following conditions:
Vehicle brake is applied
Driver depresses accelerator
pedal
Cruise control is canceled
A mode other than Drive is
selected
Driver performs upshift/
downshift requests
Cruise high or low set speeds
are exceeded
Maximum vehicle grade is
exceeded
Request by an adaptive cruise
system
DRIVING - Transmission
158 Y53-6126-1A1 (01/21)
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