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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 345 (Four Wheel Drive (4WD) Systems) >> Diagnosis And Testing >> Four Wheel Drive (4WD) Systems - Electronic Shift >> Pinpoint Tests >> Pinpoint Test O: Electronic Shift-On-The-Fly (ESOF) Functional Test >> Normal Operation

Normal Operation

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

When operating in 4H (4X4 HIGH) or 4L (4X4 LOW) mode, the transfer case and the Constant Vacuum Hublock (CVH) at each front wheel are locked. When in 4L mode, the transfer case low range gear set provides an additional 2.72 gear reduction. When operating in 2H (4X2) mode, the transfer case and both CVH are unlocked.

This pinpoint test is intended to diagnose the following:

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