2005 FORD THUNDERBIRD tires

GVWR (Gross Vehicle Weight
Rating)–is the maximum
allowable weight of the fully loaded
vehicle (including all options,
equipment, passengers and cargo).
The GVWR is shown on the
Safety Compliance Certification
Label located on the driver’s
door or B-Pillar. The GVW must
never exceed the GVWR.
Exceeding the Safety Certification Label vehicle weight rating
limits could result in substandard vehicle handling or
performance, engine, transmission and/or structural damage, serious
damage to the vehicle, loss of control and personal injury.
GCW (Gross Combined Weight)–is the weight of the loaded vehicle
(GVW) plus the weight of the fully loaded trailer.
GCWR (Gross Combined Weight Rating)–is the maximum allowable
weight of the vehicle and the loaded trailer–including all cargo and
passengers–that the vehicle can handle without risking damage.
(Important: The towing vehicle’s braking system is rated for operation at
GVWR, not at GCWR. Separate functional brakes should be used for safe
control of towed vehicles and for trailers where the GCW of the towing
vehicle plus the trailer exceed the GVWR of the towing vehicle.The
GCW must never exceed the GCWR.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Tires, Wheels and Loading
132

Maximum Loaded Trailer Weight–is the highest possible weight of a
fully loaded trailer the vehicle can tow. It assumes a vehicle with only
mandatory options, no cargo (internal or external), a tongue load of
10–15% (conventional trailer) or king pin weight of 15–25% (fifth wheel
trailer), and driver only (150 lbs [68 kg]).Consult your dealership (or
theRV and Trailer Towing Guideprovided by your dealership) for
more detailed information.
Do not exceed the GVWR or the GAWR specified on the
certification label.
Do not use replacement tires with lower load carrying capacities
than the originals because they may lower the vehicle’s GVWR
and GAWR limitations. Replacement tires with a higher limit than the
originals do not increase the GVWR and GAWR limitations.
Exceeding any vehicle weight rating limitation could result in
serious damage to the vehicle and/or personal injury.
Steps for determining the correct load limit:
1. Locate the statement“The combined weight of occupants and cargo
should never exceed XXX pounds”on your vehicle’s placard.
2. Determine the combined weight of the driver and passengers that will
be riding in your vehicle.
3. Subtract the combined weight of the driver and passengers from XXX
kilograms or XXX pounds.
4. The resulting figure equals the available amount of cargo and luggage
load capacity. For example, if the“XXX”amount equals 1,400 lb. and
there will be five 150 lb. passengers in your vehicle, the amount of
available cargo and luggage load capacity is 650 lb. (1400–750 (5 x 150)
= 650 lb.).
5. Determine the combined weight of luggage and cargo being loaded on
the vehicle. That weight may not safely exceed the available cargo and
luggage load capacity calculated in Step 4.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Tires, Wheels and Loading
133

6. If your vehicle will be towing a trailer, load from your trailer will be
transferred to your vehicle. Consult this manual to determine how this
reduces the available cargo and luggage load capacity of your vehicle.
The following gives you a few more examples on how to calculate the
available amount of cargo and luggage load capacity:
•Another example for your vehicle with 1400 pounds of cargo and
luggage capacity. You decide to go golfing. You and your friends
average 220 pounds each and the golf bags weigh approximately 30
pounds each. Is there enough load capacity to carry you, 4 of your
friends and all the golf bags? The calculation would be: 1400–(5 x
220) - (5 x 30) = 1400–1100–150 = 150 pounds; yes, you have
enough load capacity in your vehicle to transport 4 of your friends and
golf bags.
•A final example for your vehicle with 1400 pounds of cargo and
luggage capacity. You and one of your friends decide to pick up
cement from the local home improvement store to finish that patio
you have planning for the past 2 years. Measuring the inside of the
vehicle with the rear seat folded down, you have room for 12–100
pound bags of cement. Do you have enough load capacity to transport
the cement to your home? If you and your friend each wighed 220
pounds, the calculation would be: 1400–(2 x 220) - (12 x 100) =
1400–440–1200 =–40 pounds; no, you do not have enough cargo
capacity to carry that much weight. You will need to reduce the load
weight by at least 240 pounds. If you remove 3–100 pound cement
bags, then the load calculation would be:
1400–(2 x 220) - (9 x 100) = 1400–440–900 = 60 pounds; now you
have the load capacity to transport the cement and your friend home.
The above calculations also assume that the loads are positioned in your
vehicle in a manner that does not overload the Front or the Rear Gross
Axle Weight Rating specified for your vehicle on the Certification label
found on the driver’s door.
TRAILER TOWING
Your vehicle is not equipped to tow. No towing packages are available
through Ford or Lincoln/Mercury dealers.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Tires, Wheels and Loading
134

RECREATIONAL TOWING (ALL WHEELS ON THE GROUND)
Follow these guidelines for your specific powertrain combination to tow
your vehicle with all four wheels on the ground (such as behind a
recreational vehicle).
These guidelines are designed to ensure that your transmission is not
damaged due to insufficient lubrication.
All Rear Wheel Drive (RWD) vehicles:
This applies to all cars and 4x2 trucks/sport utilities with rear wheel
drive capability.
•Place the transmission in N (Neutral)
•Maximum speed is 35 mph (56 km/h)
•Maximum distance is 50 miles (80 km)
If a distance of 50 miles (80 km) or a speed of 35 mph (56 km/h) must
be exceeded, you must disconnect the driveshaft.
Ford recommends the driveshaft be removed/installed only by a
qualified technician. Improper removal/installation of the
driveshaft may cause damage to the driveshaft and internal
transmission components.See your local dealer for driveshaft
removal/installation.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Tires, Wheels and Loading
135

surface, try switching the Traction Control
system off. This may allow
excess wheel spin to“dig”the vehicle out and enable a successful
“rocking”maneuver.
If the Traction Control
system is cycled excessively, the brake portion
of the system will shut down to prevent the rear brakes from
overheating. A limited Traction Control
function using only engine
torque reduction will still help control wheels from over-spinning. When
the rear brakes have cooled down, the system will again function
normally. Anti-lock braking is not affected by this condition and will
function normally during the cool down period.
If a system fault is detected, the traction control switch’s OFF indicator
will illuminate and your vehicle should be serviced.
Aggressive driving in any road conditions can cause you to lose
control of your vehicle increasing the risk of severe personal
injury or property damage. The occurrence of a Traction Control

event is an indication that at least some of the tires have exceeded
their ability to grip the road; this may lead to an increased risk of loss
of vehicle control, vehicle rollover, personal injury and death. If you
experience a severe road event, SLOW DOWN.
STEERING
To prevent damage to the power steering system:
•Never hold the steering wheel at its furthest turning points (until it
stops) for more than a few seconds when the engine is running.
•Do not operate the vehicle with a low power steering pump fluid level
(below the MIN mark on the reservoir).
If the power steering system breaks down (or if the engine is turned
off), you can steer the vehicle manually, but it takes more effort.
If the steering wanders or pulls, check for:
•an improperly inflated tire
•uneven tire wear
•loose or worn suspension components
•loose or worn steering components
•improper steering alignment
A high crown in the road or high crosswinds may also make the steering
seem to wander/pull.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Driving
142

•If shifter (-) is tapped more than once in rapid succession, the
transmission will downshift only into the next lower gear, then when the
vehicle reaches a speed below a calibrated entry speed, the transmission
will allow a downshift into the next lower gear if again selected by the
driver. This is to prevent engine and transmission damage and to keep
the engine and transmission within allowable RPM ranges.
•An electronic indicator on the instrument cluster will display the
selected gear.
Recommended shift speeds
Upshift according to the following chart:
Recommended upshift schedule
Shift from:
1 - 2 15 mph (24 km/h)
2 - 3 25 mph (40 km/h)
3 - 4 40 mph (64 km/h)
4 - 5 45 mph (72 km/h)
If your vehicle gets stuck in mud or snow
If your vehicle gets stuck in mud or snow, it may be rocked out by
shifting between forward and reverse gears, stopping between shifts in a
steady pattern. Press lightly on the accelerator in each gear.
Do not rock the vehicle if the engine is not at normal operating
temperature or damage to the transmission may occur.
Do not rock the vehicle for more than a minute or damage to the
transmission and tires may occur, or the engine may overheat.
DRIVING THROUGH WATER
If driving through deep or standing water is unavoidable, proceed very
slowly especially when the depth is not known. Never drive through
water that is higher than the bottom of the hubs (for trucks) or the
bottom of the wheel rims (for cars). When driving through water,
traction or brake capability may be limited. Also, water may enter your
engine’s air intake and severely damage your engine or your vehicle may
stall.Driving through deep water where the transmission vent
tube is submerged may allow water into the transmission and
cause internal transmission damage.
Once through the water, always dry the brakes by moving your
vehicle slowly while applying light pressure on the brake pedal.
Wet brakes do not stop the vehicle as quickly as dry brakes.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Driving
148

Maintenance
•Keep tires properly inflated and use only recommended size.
•Operating a vehicle with the wheels out of alignment will reduce fuel
economy.
•Use recommended engine oil. Refer toLubricant specificationsin
this chapter.
•Perform all regularly scheduled maintenance items. Follow the
recommended maintenance schedule and owner maintenance checks
found in your vehicle scheduled maintenance guide.
Conditions
•Heavily loading a vehicle or towing a trailer may reduce fuel economy
at any speed.
•Carrying unnecessary weight may reduce fuel economy (approximately
1 mpg [0.4 km/L] is lost for every 400 lb [180 kg] of weight carried).
•Adding certain accessories to your vehicle (for example bug
deflectors, rollbars/light bars, running boards, ski/luggage racks) may
reduce fuel economy.
•Using fuel blended with alcohol may lower fuel economy.
•Fuel economy may decrease with lower temperatures during the first
8–10 miles (12–16 km) of driving.
•Driving on flat terrain offers improved fuel economy as compared to
driving on hilly terrain.
•Transmissions give their best fuel economy when operated in the top
cruise gear and with steady pressure on the gas pedal.
•Four-wheel-drive operation (if equipped) is less fuel efficient than
two-wheel-drive operation.
•Close windows for high speed driving.
EPA window sticker
Every new vehicle should have the EPA window sticker. Contact your
dealer if the window sticker is not supplied with your vehicle. The EPA
window sticker should be your guide for the fuel economy comparisons
with other vehicles.
It is important to note the box in the lower left corner of the window
sticker. These numbers represent the Range of MPG (L/100 km)
expected on the vehicle under optimum conditions. Your fuel economy
may vary depending upon the method of operation and conditions.
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Maintenance and Specifications
203

Remote entry system .................65
illuminated entry ......................68
locking/unlocking doors ...........62
opening the trunk .....................66
Roadside assistance ..................149
S
Safety Belt Maintenance ............86
Safety belts
(see Safety restraints) .........77–81
Safety Canopy .............................95
Safety defects, reporting ..........175
Safety restraints ....................77–81
belt minder ...............................82
extension assembly ..................86
for adults .............................78–81
for children .........................97–98
safety belt maintenance ...........86
warning light and chime ..........82
Safety seats for children ..........100
Seat belts
(see Safety restraints) ...............77
Seats ............................................74
child safety seats ....................100
Select Shift Transmission
(SST) shifter .............................146
Servicing your vehicle ..............182
Setting the clock
AM/FM/In-dash 6 CD ................18
Spark plugs,
specifications .............209, 213–214
Specification chart,
lubricants ...........................212–213
Speed control ..............................42
Starting your vehicle ........136–138
jump starting ..........................160Steering
speed sensitive .......................143
Steering wheel
controls ......................................45
tilting .........................................39
T
Tilt steering wheel ......................39
Tires ...........................109–110, 114
alignment ................................127
care ..........................................126
changing ..........................114, 116
checking the pressure ............112
inspecting and inflating .........111
label .........................................125
replacing ..................................114
rotating ....................................128
safety practices .......................127
sidewall information ...............120
snow tires and chains ............129
spare tire .........................114–115
terminology .............................110
tire grades ...............................110
treadwear ........................109, 126
Towing .......................................134
recreational towing .................135
trailer towing ..........................134
wrecker ....................................166
Traction control ........................141
Transmission .............................143
brake-shift interlock (BSI) ....143
fluid, checking and adding
(automatic) .............................207
fluid, refill capacities ..............210
lubricant specifications ..212–213
Trunk ...........................................63
remote release ....................42, 66
Turn signal ..................................30
REVIEW COPY
2005 Thunderbird(tbr), Owners Guide (post-2002-fmt)(own2002),
Market:USA_English(fus)
Index
223