1996 Ford Mustang Owner's Manual - Page 204

When one of the back 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) or 1 (First). To prevent the vehicle from moving when you change a tire, be sure the parking brake is set, then block the wheel (both directions) that is diagonally opposite (other side and end of the vehicle) to the tire that is being changed. RWARNING If the vehicle slips off the jack, you or someone else could be seriously injured. RWARNING To avoid injury, never run the engine with one wheel off the ground, such as when changing a tire. 2. 3. Get out the spare tire and jack. Remove wheel covers with the tapered end of a wheel nut wrench. Insert the handle of the wrench and twist it against the inner wheel cover flange. To remove aluminum wheel center ornaments, insert the curled end of lug wrench into pry-off notch and pry against the wheel. To avoid damage to aluminum wheel, do not twist wrench. For more about removing wheel covers, see the information later in this section. Loosen each wheel lug nut one-half turn counterclockwise, but do not remove them until the tire is raised off the ground. You should pull up on the handle rather than push to develop maximum force to loosen wheel lug nuts. See Anti-Theft Wheel Lug Nuts later in this chapter for information on removing anti-theft lug nuts. 4. 208