CONTROLS AND INSTRUMENTS
Reverse (R)
Use this position to back-up the vehicle. Stop
completely before shifting from forward to
reverse or from reverse to forward. Touch the
reverse (R) button, ‘’R’’ will be displayed and the
reverse warning signal will be activated.
Neutral (N)
Use this position to start engine. Select neutral
(N) when checking vehicle accessories and for
extended periods of engine idle operation;
parking brake must then be applied. The push-
button shifter will automatically select neutral
when the master switch is turned
ON
.
Note :
The automatic transmission does not
have a park (P) position. Select neutral (N) and
apply parking brake when the vehicle is left
unattended. A warning buzzer will sound if the
engine is stopped and the parking brake has not
been applied when foot pressure is removed
from the brake pedal.
Caution :
Detroit Diesel engines should not
be idled for extended periods at "slow" idle. For
extended idling, engine should run at "fast" idle.
Warning :
Always apply parking brake
before leaving driver's seat.
Caution :
Do not allow your vehicle to
"coast" in neutral. This practice can result in
transmission damage. Also, no engine braking is
available in neutral.
Drive (D)
Use this position for all normal driving
conditions. After touching this pad, the vehicle
will start in first or second range and will
automatically upshift to a higher range as output
speed increases. As the vehicle slows down,
output speed decreases, the transmission
automatically downshifts to the correct range. If
a locked brake or a slick surface condition
should occur, the ECU (Electronic Control Unit)
will command converter operation (disconnect
lockup) and inhibit downshifts for a period of time
or until normal wheel speed has been restored.
Note :
The transmission should normally be
allowed to shift itself, but manual shifting can be
used as described below.
Fourth (4) And Third (3) Ranges
Select these ranges when driving on moderate
grades or when load and traffic conditions
require the use of limited speed.
Second (2) Range
Select this range when operating in heavy and
congested traffic. The transmission will start in
first and automatically upshift to second. When
slowing, the transmission will automatically
downshift to first range. Low ranges provide
progressively greater engine and retarder
braking power (the lower the range, the greater
the engine and retarder braking effect).
First (1) Range
Select this range when pulling through mud and
snow or when speed control is needed for
driving up steep grades. This range also
provides maximum engine braking power or
retarder braking effect. In the lower ranges (1,
2, 3 and 4), transmission will not upshift above
the highest gear selected unless recommended
engine governed speed for that gear is
exceeded.
Warning :
Service brakes should not be
used to control the speed of vehicle on long,
steep descents. Instead, lower transmission
ranges should be used (in conjunction with
output retarder. Refer to "JACOBS Engine
Brake" and "Transmission Retarder" headings in
"Technical Information" chapter 4 for details
regarding both systems. This procedure keeps
service brakes cool and ready for emergency
stopping.
Caution :
When descending in lower
ranges, care must be taken that engine speed
does not exceed 2,450 rpm.
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