Daf LF.book - Peterbilt Motors Company

Manual Gearbox
ZF 6S-850 gearbox
The ZF 6S-850 has six fully synchronised forward gears and one non-synchronised
reverse gear.
Shifting gears
- To avoid excessive and unnecesssary clutch wear, always engage the first gear
when driving away. This applies to both laden and unladen vehicles.
- Always depress the clutch fully when shifting gears.
- Push the gear lever smoothly when shifting until the gear is engaged.
- Wait until the vehicle is at a standstill before engaging reverse. Failure to do so
may result in serious damage to the clutch, gearbox and engine.
Driving
- Select the highest possible gear while at the same time keeping the engine
speed in the green zone of the rev counter.
- When speeding up, keep the engine speed within the green area of the rev
counter as much as possible.
The reverse gear may only be selected 5 seconds after the vehicle
has come to a stop. When shifting down, you must always ensure
{that the speed is not too high for the gear you are selecting.
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