Ferrari F430 Owner's Manual page 117

On a bend, the electronic differential:
- stabilises the vehicle when the accelerator
pedal is released, locking the rear axle
- eliminates typical oversteering conditions,
producing slight understeering at the
grip limit, locking the differential in
proportion to the lateral acceleration and
the vehicle speed
- maximises stability and, at the same
time, acceleration in a bend, locking the
differential in proportion to the lateral
acceleration, the speed, the gear engaged
and the torque delivered by the engine.
To achieve these results, the electronic
differential system interacts with the engine
control, F1 gearbox, F1, CST, ABS and
shock absorber damping control system.
Alarm devices in the event of electronic
differential failure
Any malfunctioning of the electronic
differential is shown on the multi-function
display of the instrument panel (see
34-35).
Gearbox control
There are two types of gearbox control:
- manually-controlled gearbox with lever,
selector, gearbox lever housing and
Bowden transmission cables
- electronically-controlled F1 gearbox,
which uses an electro-hydraulic system
controlled by two levers on either side
of the steering wheel. These levers
substitute the traditional gearshift lever
and clutch pedal.
Compared with the manually-controlled
gearbox, the electronically-controlled
system offers the following advantages as
far as gearbox and clutch are concerned:
- faster upshifting and downshifting
- possibility of shifting to the desired
gear without taking your hands off the
steering wheel
- greater comfort because of elimination of
the clutch pedal
pages
- greater safety, as possible driver errors
are prevented
- protection against engine overrunning
caused by incorrect gearshifting.
Gearbox and differential lubrication
The gearbox and the differential gearings
are lubricated by a volumetric concentric
gear pump driven by the auxiliary reverse
gear.
6 - Technical Information
Gearbox oil cooling circuit
The gearbox/differential oil temperature is
regulated by an water/oil heat exchanger
positioned on the engine crankcase,
between the banks.
Checking and changing the gearbox/
differential oil
The gearbox/differential oil must be
checked and changed at the intervals
indicated in the Service Time Schedule at
an Authorised Ferrari Service Centre..
117