Ford Windstar Owner's Manual page 232

NOTE: If the O/D OFF indicator light is flashing on and off
repeatedly when the vehicle is started, there is a
transaxle electronic system malfunction. Contact your
dealer as soon as possible.
When to use 2 (Second)
Use 2 (Second) when driving on slippery roads or to provide
additional engine braking on downgrades. This position
provides Second and First gear operation only.
When to use 1 (First)
Use 1 (First) to provide maximum engine braking on steep
downgrades. Upshifts from First can be made by manually
shifting to 2 (Second) or j (Overdrive). 1 (First) gear provides
only first gear operation. If you select First while driving at
higher speeds, the transaxle will shift to 2 (Second), and then
downshift to 1 (First) after the vehicle decelerates to the proper
speed.
Parking
Always come to a complete stop before you shift into P (Park).
This position locks the transaxle and prevents the front wheels
from turning. To securely latch the gearshift in the P (Park)
position, pull it toward you, push it completely
counterclockwise against the stop, and then push it toward the
instrument panel.
The gearshift is securely latched in P (Park) if you can not
rotate it in a clockwise direction without pulling it toward you.
Always set the parking brake fully and make sure the
gearshift is latched in P (Park). Turn off the ignition
whenever you leave your vehicle.
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