Ford Super Duty Front Manual Locking Hub PC3Z-3B396-A

This is a front manual locking hub for the 2011-2025 Ford F-250, F-350, F-450 and F-550 Super Duty with four-wheel drive and dial-type manual hubs. It replaces PC3Z-3B396-A and crosses to BC3Z-3B396-A, AC3Z-3B396-A, BC34-3B396-AA, BC34-3B396-AB, BC34-3B396-AC and BC34-3B396-AD. It is sold as a single hub, with a silver housing, a black LOCK/FREE dial, a caged internal clutch and a rubber sealing ring on the back.

Super Duty manual hubs fail in a few predictable ways. The dial seizes or turns without clicking into LOCK. Water gets past the seal and rusts the internal clutch. Or the hub slips, so the 4x4 light comes on but the front tire on that side never pulls. If the truck will not climb out in 4WD with both dials set to LOCK, jack up each front wheel and turn it by hand. A wheel that spins freely while its dial is locked has a failed hub.

To replace it, set the dial to FREE, remove the hub bolts and pull the old hub straight off the wheel bearing. Clean the mating surface and the axle shaft splines, put a light coat of grease on the splines, and slide the new hub on so it engages the shaft without forcing it. Seat the sealing ring, torque the bolts evenly to factory spec, then turn the dial through LOCK and FREE with the wheel off the ground to confirm it engages and releases.