Wheel Hub: Description and Operation
Wheel Hubs and Bearings - Full Floating Axle - DanaWheel Hubs and Bearings
Wheel Hubs and Bearings:
The rear hub is supported or floats on the axle spindle on 2 opposed tapered roller bearings. The rear hub is retained on the spindle by a ratcheting nut that is tabbed to a slot on the spindle.
A seal is installed inboard of the inner rear wheel bearing to keep the rear axle and wheel bearing lubricant from the brake components. The full-floating rear axles on E-350 vehicles have the brake discs mounted outboard of the rear hub, permitting brake disc removal for brake inspection without the need to remove the rear hub.