Wheel bearings usually dont need maintenance until higher mileages (100k) or should be inspected and repacked when the brakes are done to ensure they last, but they do wear out - this is sometimes a fairly simple but messy job depending on the application - I personally do mine every 6 months to a year since I have a 4x4 - 4X4's need more maintenance than other vehicles due to all the components in the axle which generate more heat and wear than a typical car.
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If you are repacking front wheel bearings on a car with disc brakes,you will want to buy wheel bearing grease suitable for the higher heat generated by the disc brakes.Any name brand wheel bearing grease will work as long as it is rated to be used on vehicles with disc brakes.
TIP: Do not wash the wheel bearings in solvent to clean them if they are in good shape and have no metallic particles in the existing grease.Just repack using the new grease to push the old grease out of the bearings.After wiping the hub clean add some clean grease evenly into the hub,install the repacked bearings and new seals and JUST SNUG the nut which adjusts the bearing and install a NEW cotter pin.
Front wheel bearings on larger older rear wheel drive cars are very rarely sealed.
Repacking the bearings is a regular maintenance procedure.
I've checked a few youtube videos and here's a Good one that describes the process. https://www.youtube.com/watch?v=5BBwu2c1rLA
There is a little difference between the front and rear. The days of packing wheel bearing is almost over. The front bearing you have to pull the hub and change to bearing. The rear wheel you have to change out the hub bearing and all. The front is a sealed bearing and not serviceable. Please rate my answer so I am rewarded points for it.
Unfortunately you do not always get "play" in the bearing and they are unserviceable. Replace the entire unit. Here are the instructions for replacement. They bolt into place making it pretty easy to do. Soak the CV shaft which pertrudes from the hub where the nut goes with a good rust penetrant to ease in removal.
Removal & Installation
Before servicing the vehicle, refer to the Precautions Section.
Remove or disconnect the following:
Front wheelWheel Speed Sensor (WSS) electrical connectorBrake caliper and bracketRotorDriveshaft nut
Install a front hub removal tool to the wheel bearing/hub assembly with three wheel nuts. Use the tool to push the driveshaft out of the wheel bearing/hub.
Remove the wheel bearing/hub assembly and discard the bolts.
Install or connect the following:
Wheel bearing/hub assembly using new bolts and torque them to 96 ft. lbs. (130 Nm)New drive shaft nut and torque it to 118 ft. lbs. (160 Nm)Brake rotorFront caliper with the bracketWSS electrical connectorFront wheel
go to autozone website and register your vehicle. look under do it yourself intermediate and look at the suspension...rear. probably has a hub assembly that has to be changed. i was just on site looking at one for an 04 grand prix. hope it helps you.
a) Wheel Balance.
b) Wheel Alignment
c) Wheel Bearing.
My best guess is a wheel bearing needing replacement. If there is only noise, then MAYBE repacking of bearings. However with vibrations, the wheel bearing(s) need to be replaced. Make sure you replace both the bearing and races as a set.
Let me know if this helped or if you need additional help.
Almost all newer cars the front wheel bearings are a sealed unit. There isn't a way to remove and repack like the old style bearings. More than likely if it gets too bad, you will need to replace the hub assembly.