Ford 1999 Wagon-Econoline Owner's Manual page 134

Roadside emergencies
Type A
Type B
4. Apply the parking brake and turn
engine OFF.
5. Block the wheel that is diagonally
opposite the tire you are changing.
On E-Super Duty vehicles, the
parking brake is on the
transmission. Therefore, the vehicle
will not be prevented from moving
when a rear wheel is lifted, even if
the parking brake is applied. Be sure to block both directions of the
wheel that is diagonally opposite to the wheel that is being lifted.
If the vehicle slips off the jack, you or someone else could be
seriously injured.
134
PUSH
ON
PUSH
OFF
HOOD