Manual Hub Lockers Explained (Most People Get This Wrong)

A lot of folks think that once you lock in your manual front hubs, both front wheels are guaranteed to spin. Not quite. Locking the hubs simply connects each wheel hub to its respective axle shaft — it does not lock the front differential. All you’ve done is complete the mechanical path from the transfer case to the wheels. If your truck still has an open front differential (which most do), the diff will continue to split torque equally side-to-side and allow wheel speed difference. In low-traction situations — like ice, mud, or one tire unloaded — torque is limited by the wheel with the least grip. The result? Even with both hubs locked and the truck in 4WD, you’ll often see only one front wheel doing the spinning. In this reel, I get up close with the hub internals and walk through the actual torque flow so you can clearly see what the hubs do — and just as importantly, what they don’t do when it comes to traction.