Ford 1997 Aerostar Manual page 170

Power Braking
Increasing the engine speed above idle without
vehicle movement (such as holding the brake) in
a forward or reverse gear causes transmission
stall.
NOTE: Continued operation in the stall
condition can result in transmission
overheat, malfunction or fluid
expulsion.
Automatic Overdrive
Transmission
Putting Your Vehicle in Gear
Your vehicle's gearshift is on the steering
column. The transmission control switch is
located on the end of the gearshift lever. You
can put the gearshift in any one of several
positions.
The positions of the column-mounted gearshift
170