The hum is most likely something to do with power steering system. Have dealer check power steering system mainly the pump and rack & pinion. The dealer either ripped you off or is just guessing
SOURCE: vwCabrio humming noise
Did you replace one front bearing or both? It could be the other front wheel bearing.
SOURCE: humming noise from right front tire and front tire
could be ball joint tie rods alignment lift it n check to see if the tire has any play wen u shoake it by grabbin both sides and just a small back n forth movement to see any unusual play. if your not good at this take it to an alignment guy n theyll check the suspension before they do anything
SOURCE: 2003 Trailblazer, the front drivers side wheel
It sounds like a problem within the front differential, possibly broken spider gears. If so broken gear shrapnel may be jamming that wheels output shaft.
SOURCE: My car is making a loud humming noise. Starts
Could be a CV shaft, but it could also be the car is out of alignment causing one of the tires to scuff making the noise. If you've replaced any steering linkage, it may be the cause. Also check to see if a inner tin brake shield is rubbing on a brake rotor or wheel.
vehicle speed: check wheel bearings lift vehicle and support it with jack stands grab the wheel at the 12 and 6 o'clock positions( to rule out steering linkage play) and wiggle in and out. A bad bearing that loud will have some play.
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