Ford Thunderbird (2004 year). Manual — part 29

• One tap rearward (-) will command the transmission to downshift one

gear range.

• Upshifts are allowed at any vehicle speed, with the exception of 4th

and 5th gear. The transmission will not do a 4th or 5th gear start.
Ensure that the transmission is returned to 1st gear once the vehicle
is stopped. If this is not done, and the transmission is in 2nd or 3rd
gear, the vehicle will remain in that gear. However, if the transmission
is in 4th or 5th gear, the transmission will automatically return to 1st
gear.

• When downshifting at normal road speeds, the transmission will only

allow a downshift into the next lower gear.

• 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

24 km/h (15 mph)

2 - 3

40 km/h (25 mph)

3 - 4

64 km/h (40 mph)

4 - 5

72 km/h (45 mph)

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 from 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.

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DRIVING THROUGH WATER

If driving through deep or standing water is unavoidable, proceed very
slowly especially if 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). Traction or brake capability may be limited
and your vehicle may stall. Water may also enter your engine’s air intake
and severely damage your engine.

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. Driving through deep
water where the transmission vent tube is submerged may allow
water into the transmission and cause internal transmission
damage.

VEHICLE LOADING – WITH AND WITHOUT A TRAILER

This section will guide you in the proper loading of your vehicle and/or
trailer, to keep your loaded vehicle weight within its design rating
capability, with or without a trailer. Properly loading your vehicle will
provide maximum return of vehicle design performance. Before loading
your vehicle, familiarize yourself with the following terms for determining
your vehicle’s weight ratings, with or without a trailer, from the vehicle’s
Safety Certification Label and Tire and Load Information Label:

Base Curb Weight – is the weight of the vehicle including a full tank of
fuel and all standard equipment. It does not include passengers, cargo, or
optional equipment.

Vehicle Curb Weight – is the weight of your new vehicle when you
picked it up from your dealer plus any aftermarket equipment.

Cargo Weight – includes all weight added to the Base Curb Weight,
including cargo and optional equipment. When towing, trailer tongue load
or king pin weight is also part of cargo weight.

GAW (Gross Axle Weight) – is the total weight placed on each axle
(front and rear) – including vehicle curb weight and all payload.

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GAWR (Gross Axle Weight Rating) – is the maximum allowable
weight that can be carried by a single axle (front or rear). These
numbers are shown on the Safety Compliance Certification Label
located on the driver’s door or door pillar. The total load on each
axle must never exceed its GAWR.

Exceeding the Safety Certification Label axle weight rating limits
could result in substandard vehicle handling, performance,

engine, transmission and/or structural damage, serious damage to the
vehicle, loss of control and personal injury.

GVW (Gross Vehicle Weight) – is the Vehicle Curb Weight + cargo +
passengers.

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 door pillar. The GVW
must never exceed the GVWR.

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Exceeding the Safety Certification Label axle weight rating limits
could result in substandard vehicle handling, 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 weighing more than 680 kg
[1,500 lbs]). The GCW must never exceed the GCWR.

Tongue Load or Fifth Wheel King Pin Weight – refers to the amount
of the weight that a trailer pushes down on a trailer hitch.

Examples: For a 2268 kg (5000 lbs.) conventional trailer, multiply 5000
by 0.10 and 0.15 to obtain a proper tongue load range of 227 to 340 kg
(500 to 750 lbs.). For an 5216 kg (11,500 lbs.) fifth wheel trailer,
multiply by 0.15 and 0.25 to obtain a proper king pin load range of 782
to 1304 kg (1,725 to 2,875 lbs.)

Do not exceed the GVWR or the GAWR specified on the
certification label.

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