Daf LF.book - Peterbilt Motors Company

Automatic Gearbox
therefore advisable to depress the brake pedal before selecting position "D". In this
position the gearbox will automatically shift up and down in all forward gears. In the
"1", "2" and "3" positions the gearbox shifts up to the selected gear. These positions
are used to keep the engine within the proper speed range or to obtain the
maximum engine brake performance.
Reverse
If position "R" is chosen the vehicle will also be immediately set in motion. In this
case, too, first depress the brake pedal and then select "R" position.
Faults
If the transmission fault warning symbol lights up in the master display, a fault has
been detected in the gearbox.
Read the following recommendations first or consult an authorized dealer if
necessary.
Gearbox
The ECU will block the functions of the selector lever and ensure that the gearbox
will select a "safe gear". It is important to drive the vehicle to a safe place as soon as
possible and switch the ignition off. It will no longer be possible to shift the gearbox
to neutral. The ECU will prevent this.
After approximately 30 seconds, try starting the engine again and engaging a gear.
If the fault is one whereby the gearbox must in no circumstances be shifted, the
ECU will no longer shift the gearbox. Driving is therefore no longer possible!
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