Ford Aerostar (1997 year). Manual — part 44
176
When to use Drive
You will note there is not a drive position on
your gearshift indicator. However, you will find
a transmission control switch labeled
OVERDRIVE OFF located on the end of the
gearshift lever. With overdrive canceled and the
OVERDRIVE OFF illuminated, the transmission
will operate in gears one through four. This is
useful if you experience frequent
downshift/upshift conditions, when operating a
heavy load or in hilly terrain, or if additional
engine braking is useful. However, shift back to
j
(Overdrive) whenever practical for optimum
powertrain cooling and fuel economy. This can
be accomplished by pushing the transmission
control switch again, to cancel the OVERDRIVE
OFF control and light.
When to use 2 (Second)
With the gearshift in the 2 (Second) position,
more engine braking is provided. Use the 2
(Second) position to drive up moderately steep
grades, to start up slippery roads, or to provide
moderate engine braking on downgrades. DO
NOT GO FASTER THAN 55 mph (88 km/h) IN
THIS GEARSHIFT POSITION.
When to use 1 (Low)
With the gearshift in the 1 (First) position,
maximum engine braking is provided. This
position provides 1 (First) gear operation only
with no automatic upshifts. To obtain upshifts,
the gearshift must be moved out of this position.
Use the 1 (First) position to drive up steep
grades or to provide maximum engine braking
on downgrades.
177
Forced Downshifts
To gain acceleration in
j
(Overdrive) or Drive
(Overdrive off) when passing another vehicle,
push the accelerator to the floor. The
transmission will downshift to the appropriate
gear: fourth, third, second or first gear.
Traction-Lok Rear Axle
(If equipped)
This axle provides added drive away traction on
slippery surfaces, particularly when one or more
wheels are on a surface with poor traction.
Extended use of other than matching size tires
on a Traction-Lok rear axle could result in a
permanent reduction in effectiveness. This loss of
effectiveness does not affect normal driving and
should not be noticeable to the driver.
Electronic 4-Wheel Drive (E-4WD)
(If equipped)
If your vehicle is equipped with the E-4WD
option, power is provided to all four wheels
whenever you press the accelerator pedal. It
improves both handling and traction during
difficult driving conditions, adjusting
automatically to your driving needs. Because the
entire E-4WD system is controlled by a
microprocessor, your vehicle is not equipped
with the switch or shift lever used with most
traditional 4WD vehicles. The microprocessor
does all the adjusting for you.
178
How the Electronic 4-Wheel Drive (E-4WD)
System Works
Under normal driving conditions, when the road
is firm, dry and level, the engine power is
distributed one-third to the front axle and
two-thirds to the rear axle. However, if a wheel
begins to slip, the microprocessor will sense this
condition and signal the system to transmit more
power to the axle with more traction. (You may
feel a momentary surge of power.)
NOTE:
The microprocessor is disabled when
the brakes are applied or when the
transmission selector is in the P (Park)
or N (Neutral) positions.
Driving Your Electronic 4-Wheel Drive
(E-4WD) Vehicle
Since your E-4WD vehicle is unique, follow these
steps to be safe:
❑
Avoid unnecessary turns or other maneuvers
that could cause loss of control and possible
injury.
❑
Use the same size and type of tire and wheel
as originally provided for your vehicle and
inflate the tires to the manufacturer’s
recommended air pressure.
❑
Become familiar with your vehicle’s operating
characteristics and study this Owner Guide
for specific operating instructions. Be sure all
occupants wear the safety belts provided.
Drive cautiously, defensively, and at speeds
safe for current road conditions.
179
❑
Do not let the added driving traction of
E-4WD lead you to believe that you can stop
any quicker than a conventional two-wheel
drive vehicle. The added traction performance
does not improve the braking ability of the
E-4WD vehicle. Allow the same amount of
distance when braking as with a two-wheel
drive vehicle.
R
WARNING
Your E-4WD Aerostar is a passenger
vehicle designed for on-road use; it is not
intended for any off-road use.
R
WARNING
On-vehicle wheel balancing will cause
damage to the drivetrain of E-4WD
Aerostars.
Driving With a Heavy Load
There are limits to the amount of weight your
vehicle can carry or tow. The total weight of
your vehicle, plus the weight of the passengers
and cargo, should never be more than the Gross
Vehicle Weight Rating (GVWR). Also, the weight
that your vehicle carries over the front axle and
rear axle should never be more than the Gross
Axle Weight Rating (GAWR) for the respective
axle.
The weight limits of your vehicle’s tires affect
the GVWR or GAWR limitations. Usage of
replacement tires with higher weight limits than
originals does not increase GVWR or GAWR.
Usage of lower capacity replacement tires may
lower GVWR and GAWR limitations.
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