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Home >> Ford >> 2004 >> Excursion 6.8 S, 4WD >> Repair and Diagnosis (Single Page) >> Drivelines & Axles >> Locking Hubs >> Four-Wheel Drive Systems - Excursion & F250-F550 Super Duty >> Diagnosis And Testing >> Four-Wheel Drive Systems - Mechanical Shift >> Principles of Operation >> 4-Wheel Drive - 4X4

4-Wheel Drive - 4X4

In 4X4, the range sleeve remains in the same position as it was in 2WD. The action of the shift lever causes the mode sleeve to move rearward, locking the drive sprocket and chain to the rear output shaft. This causes both the front and rear wheels to be driven in the high range.