Porsche 928 S4 – Owner’s Manual |
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Model Year 1987 From
the “Porsche 928 S4 Owner’s Manual”, available from 928 Specialists. |
Gearshifting
Manual Transmission The
Porsche transmission with servo-lock synchronization permits rapid and
precise shifting of gears. When
changing gears make sure that the clutch pedal is fully depressed to the floor,
and that the gearshift lever is completely engaged. The engine speeds for the individual gears are listed on
this page. Reverse Reverse should only be selected after the vehicle has come to a complete stop. The
clutch pedal must be depressed several seconds before shifting into reverse;
only then move the gearshift lever to the left, overcoming the spring
resistance, and to the right. Both
back-up lights come on when the transmission is put into reverse (with
ignition on). The
gear positions are illustrated in the diagram. If
you wish to shift from 1st gear into Reverse, the
gearshift lever must first be brought in the Neutral position between
4th and 5th gear and then shifted into Reverse. This is necessary because of the
reverse gear lock-out mechanism. For
smooth shifting, observe the following shift points which apply to standard
gear ratios only: Maximum downshifting points 5th
to 4th gear 148
mph/237 km/h or 4300 rpm 4th
to 3rd gear 111
mph/178 km/h or 4700 rpm 3rd
to 2nd gear 80
mph/128 km/h or 4600 rpm 2nd
to 1st gear 53
mph/85 km/h or 4300 rpm Minimum
upshifting points 1st
to 2nd gear 15
mph/24 km/h or 1900 rpm 2nd
to 3rd gear 25
mph/40 km/h or 2000 rpm 3rd
to 4th gear 40
mph/64 km/h or 2300 rpm 4th
to 5th gear 48
mph/77 km/h or 1400 rpm Please observe all local and national speed limits! Controls
for Automatic Transmission The selector lever has 6 positions:
Start in Park The
selector lever has a push button in the handle. The push button must be depressed when selecting the
following positions: From
The
selector lever can be moved freely between the other positions. The
position of the gear shift lever lights up in the tachometer display field
whenever the vehicle lights or ignition are switched on. Remember the following basic rules: Apply
the parking brake or foot brake before selecting a driving position. When the selector lever is in a
driving position, the car may creep even at idle speed. Therefore, do not release the parking
brake or foot brake until you are ready to move. When
the vehicle is standing still, wait for it to switch to drive after selecting
the gear. At this time the
engine must run at idle speed so that no undue stress will be placed on the
automatic clutches in the transmission. Do not step on the accelerator until positive contact has been made. If
the selector lever is unintentionally moved into Neutral (N) while driving,
take your foot off the accelerator pedal and wait until the engine speed has
dropped to idle before selecting a driving position. Never shift into reverse (R) or Park (P) when the car is in motion. Never
get out of the driver’s seat when the engine is running and the selector
level is not in the “P” position. Move the selector lever in “P” and apply
parking brake. Always
make sure the selector level is in the “P” position when checking
under the hood. Otherwise, any
increase in engine speed may set the vehicle in motion, even with the
parking brake applied. A
driving position must never be used for holding the vehicle at rest
uphill. Always use your foot
brakes when stopped on inclines. WARNING While
driving with the automatic speed control set (at speeds above 30 mph or 50
km/h), do not bring shift lever into Neutral position to prevent excessive
engine rpm. Driving the automatic transmission
The
Automatic Transmission has 4 forward gears and one reverse. In driving positions D, 3 and 2 the
Automatic Transmission changes gears automatically while driving. Position D is
the driving position normally used for city and highway driving. It ranges from zero to top speed, and
all four gears shift automatically depending on driving speed. Position 3 is
to be used for mountain driving or slow driving, when towing a trailer and
also when you want to make use of the engine’s braking effect. In “3”, the first, second and third
gears will engage automatically.
Therefore, only shift down into driving position “3” when the speed is
below 90 mph or 145 km/h. It is not
necessary to let up on the accelerator. Position 2 is
needed on rare occasions. It should
only be used up to 75 mph or 120 km/h.
In “2” the transmission will only shift into first or second gear and
not shift into the third or fourth gear. Only shift down into “2” when the car speed is below 40 mph or 65 km/h. The reverse position R Reverse
position should be selected only when the car has come to a full stop and the
engine is running at idle speed. The
back-up lights come on automatically when you engage Reverse (with ignition
on). Starting the engine is
only possible when the selector lever is in Neutral or in Park (N
or P). As long as one of the
driving positions is engaged a safety switch prevents the engine from being
started. Emergency starting Should
the engine fail to start see “Emergency
starting with jumper cables” or consult your authorized Porsche dealer. Do not start or tow the car without ATF in the transmission, as this will result in serious damage to transmission and torque converter. Putting the car in gear With
the parking brake or foot brake set, shift into the range you wish to use,
usually position D. To
accelerate, release the brake and depress the gas pedal. WARNING Do
not release the brake before you are prepared to move, because power is
transmitted to the wheels as soon as a driving range is engaged. Selecting
a driving position while driving is
easy. Simply release the
accelerator pedal and move the selector lever from the position you are in to
the position you want. Then step
on the accelerator again. WARNING Do
not shift to a lower driving position until vehicle speed has dropped below
the specified limits. Engine
speed will suddenly increase and may cause engine damage and loss of vehicle
control. Stopping When stopping temporarily, at traffic lights for example, it is not necessary to move the selector lever to Neutral. Simply apply the brakes. To start again release the brake and accelerate. Parking When
parking your car, apply the parking brake first, and then move the selector
lever to position P. To do this,
depress the button and push the lever through R to P. The transmission is then mechanically
locked. Park may only be engaged
when the car is stationary. At
driving speed above 10 mph or 15 km/h, a hydraulic lock prevents the driver
from unintentionally moving the selector lever into position R or P. Do not remove the key from the ignition steering lock until you have parked the car, because removal of the key locks the steering wheel. Shift
out of
the Park position, before releasing the parking brake. When
the car is parked on a steep hill, shifting out of Park may be a little
harder. This is due to the
weight the car exerts on the transmission. Neutral Shift
to this position for standing with brakes applied. Never use Neutral for coasting downhill. You may lose control over the car because of reduced braking and cause serious damage to the transmission when a driving range has to be selected. Maneuvering When
alternating between forward (D) and reverse (R) (for instance,
while maneuvering the car into a tight parking space), only shift into Reverse
or Drive when the car has come to a full stop and the engine is
running at idle speed. Stuck in snow, mud or sand When
alternating between Drive and Reverse in an effort to free the
vehicle, depress the accelerator pedal lightly while the transmission is in
gear, and release the accelerator pedal while shifting. Do not race the engine and avoid
spinning the wheels. Do not repeat “rocking” back and forth with wheels spinning at high engine speed and heavy throttle, as serious damage may be caused in the automatic transmission and other critical parts. If
you cannot free the vehicle after a few “rocking” attempts, call for help or
a tow truck. For
good fuel economy we recommend smooth and even acceleration. Very fast, racy driving, alternating
between full throttle and hard braking, raises the fuel consumption
considerably. Also, tires and
brake linings wear faster. It is
more economical to drive smoothly and at a fairly constant speed. Accelerator “Kickdown” When
depressing the accelerator pedal you will find resistance near the full
throttle position. By applying
greater pressure the pedal can be pushed beyond this point to the kickdown
position. The transmission will
now shift automatically into the next lower gear to give you maximum
acceleration, and only shift up again after the engine has reached maximum
speed in that particular gear. Be careful when using the kickdown on slippery roads. Rapid acceleration may cause skidding. Please
observe the following when applying the accelerator kickdown: With
the selector in D, you can apply the kickdown to make the transmission shift down
into third gear when driving below 120 mph or 195 km/h, into second gear when
driving below 70 mph or 115 km/h and down to first gear when driving below 25
mph or 40 km/h. With
the selector lever in “3”, you can apply the kickdown to make the transmission
shift down into the second gear when driving below 70 mph or 115 km/h and
into first gear when driving below 25 mph or 40 km/h. With the selector lever in “2”, you can apply the kickdown to make the transmission shift down into first gear when driving below 25 mph or 40 km/h. As
soon as you release the pedal from the kickdown position the next higher gear
is automatically engaged. Please observe all local and national speed limits. |
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