FORD 2001 Explorer Sport Trac - Manual (Page 171)

Tire change procedure
When one of the front wheels is off the ground, the transmission
alone will not prevent the vehicle from moving or slipping off the
jack, even if the vehicle is in P (Park) (automatic transaxle) or R
(Reverse) (manual transaxle).
To prevent the vehicle from moving when you change a tire, be
sure the parking brake is set, then block (in both directions) the
wheel that is diagonally opposite (other side and end of the vehicle) to
the tire being changed.
If the vehicle slips off the jack, you or someone else could be
seriously injured.
1. Park on a level surface, activate
hazard flashers and place gearshift
lever in P (Park) (automatic
transmission) or R (Reverse)
(manual transmission).
2. Set the parking brake and turn
engine OFF.
3. Block the diagonally opposite
wheel.
Roadside emergencies
171