Greasable vs Sealed Wheel Bearings – Which Is Better?

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Older trucks and rear-wheel-drive cars used serviceable wheel bearings that you could repack with grease. Modern cars use sealed bearings that are lubricated for life. The two designs have trade-offs, and knowing which one your car uses helps with maintenance and replacement decisions. The greasable bearing is not always better, and the sealed bearing is not always disposable.

What the driver feels

A humming noise from one wheel.
Play in the wheel on a lift.
A warm hub after a drive.
The ABS light coming on.
A vibration through the floor.
A noise that changes when turning.
Tire wear on one corner.
A bearing that has gone dry after many miles.

Comparing the two designs

Sealed bearings are the modern standard. On a Honda Civic or Toyota Corolla, the bearing is sealed inside the hub assembly, packed with grease at the factory. There is no grease fitting, and you cannot service it. When it wears, you replace the whole hub. The advantage is that no dirt or water gets in, and the bearing stays clean for the life of the car.

Greasable bearings are found on older trucks. On a Ford F-150 or Jeep Wrangler, the bearing is a tapered roller design with a adjustable nut, and you can repack it with grease at every brake job. The advantage is that you can maintain it, and you can adjust the preload. The disadvantage is that the seal can leak, and dirt can get in, which wears the bearing faster.

Which design do you have

Identify the car: most front-wheel-drive cars from 1990 onward have sealed bearings.
Most rear-wheel-drive trucks and older cars have serviceable tapered bearings.
Look for a grease fitting on the hub: if there is one, it is serviceable.
Check whether the hub has an adjustable spindle nut, which is the serviceable design.
For serviceable bearings, repack the grease at every brake job or every 30,000 miles.
Safety note: Serviceable bearings need proper preload adjustment, which requires a torque wrench and feeler gauge.
For sealed bearings, there is no maintenance, and the whole hub is replaced when worn.
Compare the cost: sealed hubs cost more in parts, but they last longer without service.

Maintaining each type

For sealed bearings, replace the whole hub assembly when they wear. There is no service.
For serviceable tapered bearings, repack with grease at every brake job or every 30,000 miles.
Adjust the preload on serviceable bearings to specification, because too much preload destroys the bearing.
Replace the bearing seal whenever you repack, because the old seal is likely leaking.
After either repair, road test to confirm the noise is gone.