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Home >> Ford >> 2002 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2451 (Transfer Case - Four Wheel Drive (4WD) Systems -- F250-F550 Super Duty) >> Diagnostic Tests >> 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 2008 Ford Pickup, 2008 Ford F550 Super Duty, 2008 Ford F450 Super Duty, and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

When operating in 4X4 High, the transfer case and both pulse vacuum hubs (PVH) are locked. When in 4X4 Low, the transfer case low range gear set provides an additional 2.72 gear reduction. When operating in 2WD, the transfer case and both PVHs are unlocked.

This pinpoint test is intended to diagnose the following:

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