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Home >> Ford >> 2003 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2611 (Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - Mechanical Shift >> Pinpoint Tests >> Pinpoint Test F: Manual Shift-On-Stop (MSOS) Functional Test >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2011 Ford Pickup, 2011 Ford F550 Super Duty, 2011 Ford F450 Super Duty, and 2011 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

When operating in Four-Wheel Drive (4WD) high (4H) mode, the transfer case locks the front driveline to the rear. When set to the LOCK position, the manual hublocks connect the front axle shafts to the wheel hubs. When in 4WD  low (4L) mode, the transfer case low range gear set provides an additional 2.72:1 gear reduction. When operating in 2-Wheel Drive (2WD) high (2H) mode, the transfer case decouples the front driveline from the rear driveline. For improved fuel economy, both manual hublocks should be set to FREE in 2H mode.

This pinpoint test is intended to diagnose the following:

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