Porsche 928S 1983 Driver Manual page 49

Automatic gearbox
The automatic gearbox facilitates the driv­
ing of the vehicle. The individual gears are
selected automatically, depending on the
position of the gear selector lever, the
speed of the vehicle and the position of the
accelerator.
For safety reasons, the motor can only be
started with the selector lever in positions Ρ
or Ν.
The selector lever has six positions, and is
fitted with a mechanical lock-out, to avoid in­
advertent selecting of the wrong gear.
The lock-out button must be pressed when
changing from
. .. to . . . R
Ρ
Ρ
R ... to ...
Ν ... to ... R
... to ... 1
?
At speeds in excess of 15 km/h (10 mph) a
hydraulically operated mechanical lock-out
avoids changing into R or P.
The selector-lever console is illuminated.
Operation
Before selecting a gear with the engine run­
ning and the car stationary, either the hand­
brake must be on, or the footbrake operat­
ed. The brakes should only be released
when you wish to drive away, as the vehicle
will creep as soon as gear is selected. Do not
accelerate while selecting a gear.
At speeds in excess of 50 km/h (30 mph) Ν
should not be selected. Should however Ν
be selected inadvertantly during driving, the
accelerator should be released to allow the
engine to attain tick-over revolutions, before
the gear is selected again. This avoids over­
loading the fluid clutch.
It is extremely important for correct func­
tioning of the automatic gearbox, that the
correct fluid level is maintained. For this
reason you should check the fluid level fre­
quently, between the normal servicing of
the vehicle.
If there is no automatic transmission fluid in
the gearbox or the torque convertor, the
engine must not be started, nor must the
vehicle be towed.
The automatic gearbox and the torque con­
vertor are both filled with ATF, simultaneous­
ly. The back axle is filled with Hypoid oil. For
filling amounts see the chapter "Filling capa­
cities".
47