2004 PORSCHE 911 GT3 transmission

Power transmission

The differential lock,which wasdesigned foruse
in motor sport,maymake aslight noisewhen
maneuvering andontight corners.

Porsche Ceramic Composite Brake
IPCCB)

The high-performance brakesystem isdesigned
for optimal braking effectatall speeds andtem-
peratures. Certainspeeds, brakingforcesandam-
bient conditions (suchastemperature andhumid-
ity) therefore mightcause brakenoises.
Wear onthe different components andbraking
system, suchasbrake padsorbrake discs,
depends toagreat extent onthe individual driving
style andtheconditions ofuse andtherefore
cannot beexpressed inactual milesonthe road.
The values communicated byPorsche arebased
on normal operation adaptedtotraffic. Wearin-
creases considerably whenthevehicle isdriven
on race tracks orthrough anaggressive driving
style.

I>
Please consult yourauthorized Porschedealer
about thecurrent guidelines
in
effect before
such useofyour vehicle.
Aerodynamic
components

To benefit fromthehigh driving performance with-
out impairing thedriving safetyorthe service life
of the vehicle components, certainvehicle parts
must bealways fullyoperational whiledriving.

I>
Regularly checkyourvehicle forsigns ofdam-
age.
Damaged, wornormissing aerodynamic com-
ponents suchasspoilers orunderside panels
affect driving behaviour andmust therefore be
replaced immediately.
To optimise thecooling ofthe PCCS brakediscs,
large airbrake spoilers arefitted tothe front and
rear running gearcontrol arms.
If these air-brake spoilersarenotfitted andthere
is ahigh thermal demand onthe braking system,
the service lifeofthe PCCS brakediscscould be
reduced.
The aerodynamic stabilityofthe vehicle isinflu-
enced considerably athigh speeds bythe front lip.
Due tothe small ground clearance requiredforthe
optimisation ofthe driving behaviour, thefront lip
and theair-brake spoilershavetobe placed inex-
posed positions tofulfil their function. Theycanbe
damaged, forexample byground orcurbstone
contact.
Ground
clearance

Please bear
in
mind thelimited ground clearance
of your caronuneven surfaces, whenparking
(curbs), onramps, liftingplatforms, etc.

Seating
Your carhas two seats.
The area behind theseats isnot intended forpas-
sengers.

A
Danger!
Severe personal injuryordeath canresult in
the event ofan accident.

I>
Never allowanyone tosit inthe area behind the
seats.

•Brakewarning lightUSA
~ Brakewarning lightCanada

If the warning lightsinthe instrument panelandon-
board computer goonwhile driving, thebrake flu-
id level maybetoo low, or(ifthe brake pedaltrav-
el has increased) oneofthe two brake circuits
may have failed.
A greater braking pressure willberequired, stop-
ping distances willbelonger andthebraking be-
havior willchange, particularly incurves.
With correctly adjustedbrakes,andacorrectly
working brakesystem, thepedal travel tothe
point ofbrake actuation shouldbe1-3/16 in.to
1-9/16 in.or30 to40 mm.
Whenever thebrake pedaltravel exceeds thisdis-
tance, havethebrake system checked.

42
Controls, Instruments
Brake
pedal

A
Warning!
Risk ofan accident.
Any obstruction ofthe brake pedalcould
increase thestopping distance.

~ Always checkthemovement ofthe brake ped-
al before driving andmake surethatitis not
obstructed byafloor matorany other object.
~ Secure thefloor mattoprevent itfrom sliding
into positions thatcould interfere withthesafe
operation ofyour vehicle.
Your Porsche dealerwillbeglad tooffer you
floor mats ofthe correct sizeincluding asecur-
ing possibility.

Note

In case oneofthe two brake circuits fails,in-
creased pedaltravel isrequired tobring your
vehicle toafull stop.
A

Warning!
To avoid overheating andpremature wearof
the brakes:

~ Before descending asteep grade, reduce
speed andshift thetransmission intoalower
gear ordriving position tocontrol speed.
~ Donot "ride thebrakes" byresting yourfooton
the pedal whennotintending toapply brake
pressure.
~ Donot hold thepedal downtoolong ortoo
often.
This could cause thebrakes toget hotand not
function properly.

CarTelephone and
Aftermarket Alarms

Important legalandsafety information
regarding theuse ofcellular telephones

Some states mayprohibit theuse ofcellular tele-
phones whiledriving avehicle. Checkthelaws and
regulations onthe use ofcellular telephones inthe
areas where youdrive.

/i\
Danger!
Risk ofan accident.
Severe personal injuryordeath canresult in
the event ofan accident.
Looking awayfromtheroad orturning your
attention awayfromyourdriving cancause
an accident andserious orfatal injury.

When usingyourcellular telephone, youshould al-
ways:
" Give fullattention toyour driving -pull offtile
road andpark before making oranswering a
call iftraffic conditions sorequire;
and

" Keep bothhands onthe steering wheel-use
hands-free operation(ifavailable) -pull offthe
road andpark before usingahand-held tele-
phone.
It
is essential toobserve theinstructions of
the telephone manufacturer beforeputting
the telephone intooperation.

Any portable telephone orradio transmitter which
is used inaPorsche mustbeproperly installedin
accordance withthetechnical requirements of
Porsche.

The transmission powermustnotexceed

lOW.

The devices mustpossess atype approval for
your vehicle andhave an"e"
symbol.

If you should require equipment withtransmission
power values greater than10 W, please consult
your authorized Porschedealerforthis purpose.
He isfamiliar withthetechnical requirements for
installing devicesofthis kind.
The antennas forallradios andtelephones witha
transmitting antennamustbeexternally mounted.
The improper installation ofradios ortelephones
or use ofaradio ortelephone withatransmitting
antenna insidethecar may cause
thewarning
lights tocome on.

Improper installation ofsuch equipment cancre-
ate adischarged batteryorexcessive current
draw fromadded equipment. If
aftermarket systemsareinstalled bynon-dealer-
ship technicians oroutside theselling dealer,
problems mayresult. Installation ofaftermarket
equipment isnot covered undertheNew CarWar-
ranty.
" Consult yourauthorized Porschedealerabout
the installation ofnon Porsche approved equip-
ment.

Reception quality

The reception qualityofyour cartelephone will
change constantly whenyouaredriving. Interfer-
ence caused bybuildings, landscape andweather
is unavoidable. Itmay become particularly difficult
to hear when usingthehands-free functiondueto
external noisesuchasengine andwind noise.

Automatic car-wash

" Unscrew externalantennas beforeusinganau-
tomatic car-wash.
Controls, Instruments
107

Maintenance,CarCare

Caution 112
Coolant Level 113
Engine Oil 114
Engine OilLevel 115
Engine OilRecommendation 117
Brake FluidLevel 119
Fuel Economy 120
Fuel Recommendations 122
Portable FuelContainers 123
Emission ControlSystem 124
Fuel Evaporation Control 126
Washer Fluid 126
Power Steering 127
Air Filter 128
Particle Filter 128
Manual Transmission Oil 128
Wiper Blades 129
Car Care Instructions 130
Maintenance, CarCare

AirFilter

A dirty airfilter notonly reduces engineperfor-
mance, butcan lead topremature enginewear.
Regular filterreplacement ispart ofthe routine
maintenance service.

[>
Industy conditions, checkthefilter element
more frequently andreplace ifnecessary.

Particle Filter

The fresh airpassing through theparticle filterinto
the passenger compartment isvirtually freeof
dust andpollen.

[>
Ifthe outside airispolluted byexhaust fumes,
press thecirculating-air button.
A dirty filter canbethe cause ofreduced airflow:

[>
Have filterreplaced byyour authorized
Porsche dealer.
Regular filterreplacement ispart ofthe routine
maintenance service.
Maintenance, CarCare
Manual
Transmission Oil

The transmission oilhas tobe checked and
changed atthe intervals listedinyour Maintenance
Schedule.

[>
Please observe thechapter "CAPACITIES" on
Page 185.
We recommend thatyouhave thetransmission oil
changed atyour Porsche dealer,whohasthere-
quired lubricants andthenecessary fillingequip-
ment.
If you suspect anoilleak inthe transmission, have
your authorized Porschedealercheckitout imme-
diately.

A
Warning!
Danger offire and serious personal injuries.

t>
Donot apply additional undercoating orrust-
proofing onornear theexhaust manifold, ex-
haust pipes, catalytic converters orheat
shields. Duringdriving thesubstance usedfor
undercoating couldoverheat andignite.

t>
Before applying freshunderseal, carefullyre-
move deposits ordirt and grease. Onceithas
dried, thenew undercoating compoundforms
a tough protective coatingwhichprovides effi-
cient rust-proofing ofthe floor panels andcom-
ponents.

t>
Always applyafresh coating ofsuitable preser-
vative tounprotected areasaftercleaning the
underside ofthe body, thetransmission, the
engine orcarrying outrepairs tounder-body,
engine ortransmission components.
Effective rust-proofing isparticularly important
during thecold weather season.
If
your carisdriv-
en frequently inareas where salthas been spread
on the roads, thewhole engine compartment
should becleaned thoroughly afterthewinter to
prevent saltfrom causing anylasting damage. A
full under-body washshould alsobeperformed at
the same time.

134
Maintenance, CarCare
Door,
roof,lidand window seals

t>
Wash dirt(e.g. abrasion, dust,roadsalts) from
all seals regularly usingwarm soapy water. Do
not use anychemical cleaningagentsorsol-
vents.
When thereisafrost hazard, theouter doorseals
and thefront andrear lidseals canbeprotected
against freezing intoplace byasuitable careprod-
uct.

In order toprevent damage tothe anti-
friction coating, theinner doorseals must
not betreated withcare products.
Headlights,
lights,interior andexterior

plastic parts

t>
Use
only
clean water andalittle dishwashing
detergent toclean lightlenses, plastichead-
light lenses, plasticpartsandsurfaces.
Do not clean whendry.
Use asoft sponge orasoft, lint-free cloth.Gen-
tly wipe thesurface withoutapplying toomuch
pressure.
The Porsche insidewindow cleanerisalso suit-
able forcleaning plasticsurfaces. Followthe
cleaning instructions onthe container.
Never useother chemical cleanersor
solvents.

£>
Rinse cleaned surfaces withclear water.

Vehicle Identification

When ordering sparepartsormaking
inquiries. pleasealwaysquotethevehicle
identification number.

Vehicle identification label

Vehicle identification labelisattached tothe inner
side ofthe luggage compartment hoodbelow the
hood lock.Itcontains allimportant dataabout
your car.
Vehicle Identification, TechnicalData This
label contains thefollowing information:
1. Vehicle Identification No.
2. TypejType description
3. Engine codejTransmission code
4. Paint No.jlnterior
5. Optional equipment
A duplicate ofthis label isinyour Maintenance
Booklet.

Note

This data bank cannot bere-ordered ifit is lost or
damaged.

Vehicleidentification number

In accordance withFederal SafetyRegulations,
the vehicle identification numberofyour carislo-
cated atthe bottom leftofthe windshield frame
and canbeseen from theoutside.
The vehicle identification numberisalso inthe lug-
gage compartment onthe right nexttothe battery

(arrow).

Transmission
1 st gear
2nd gear
3rd gear
4th gear
5th gear
6th gear
Reverse
Final drive ratio

lire Pressures forcold tires
3.82:
1

2.15:1 1.56 :1
1.21 :1

1.00 :1

0.85: 1

2.86: 1

3.44:1

Summer tiresandsnow tires
Front 32psi(2.2 bar)overpressure
Rear 39psi (2.7 bar)overpressure
These tirepressures applyonlytothe tire makes andtypes approved byPorsche.
Please observe thechapter "TIRESIWHEELS" onPage 141.
TechnicalData