1996 Ford Explorer Owner's Manual - Page 293

Driving Your Explorer Vehicles with trailers should not be parked on a grade. However, if you must park on a grade, place wheel chocks under the trailer's wheels as follows: s Apply the brake pedal and hold. s Have another person place the wheel chocks under the trailer wheels. s With the chocks in place, release the brake pedal, making sure the chocks are holding. s For automatic transmissions - apply the parking brake by pressing the service brake pedal down firmly with your right foot while applying the parking brake pedal with your left foot. s For manual transmissions - apply the service brake and shift into N (Neutral) while still maintaining pressure on the service brake pedal. Set the parking brake fully. s Shift an automatic transmission into Park (P). Put the gearshift of a manual transmission in Reverse. If your vehicle is equipped with four-wheel drive make sure the transfer case is not in Neutral. To start, after being parked on a grade: s Apply the brake pedal and hold. s Start the engine. s Shift transmission into gear and release the parking brake. s Release the brake pedal and move the vehicle uphill to free the wheel chocks. s Apply the brake pedal and hold while another person retrieves the chocks. 293