1997 Ford Expedition Owner's Manual - Page 118

Driving CONTROL TRAC-AUTOMATIC FOUR-WHEEL DRIVE SYSTEM (IF EQUIPPED) Your 4x4 features a heavy-duty Control Trac system, includes a computer-operated transfer case. Coupled with a center-disconnected front axle, this unique system is interactive with the road, continually monitoring and adjusting torque delivery to the front and rear wheels to optimize vehicle control. VOL - PUSH ON AM FM BASS TREB FM 1 ST CLK BAL FADE AUTO SET SEEK TUNE DISCS SCAN EJ DOLBY SYSTEM TAPE CD P REW 1 FF 2 SIDE 1-2 3 4 COMP 5 SHUFFLE 6 LO 2H A4WD OFF 4H 4L HI *A/C *MAX A/C A4WD 4H 4L 2H Positions of the Control Trac system The Control Trac A4WD system functions in four modes: • 2H position delivers power only to the rear axle. • A4WD position delivers power to the rear axle, and the front axle when road conditions dictate the need for increased traction. • 4H position provides mechanically locked four-wheel drive power delivery to front and rear axles. • 4L position provides mechanically locked four-wheel drive when above average power at reduced speeds is required. A4WD 4H 4L 2H 119