You can tell if the main thrust bearing is bad by simply checking out the oil. If you notice little metal particles, chances are the thrust bearing has spoiled.
As with any bearing going bad it would growl and the noise would increase with speed.
A growl or rumble that changes pitch when you turn left or right would be a wheel bearing going bad. A bad strut would allow that corner of the car to bounce too much.
front wheel bearing bad on a motorcycle
No, main bearing noise is a rumble Throw out/release bearing for the clutch will only be heard when the clutch pedal is depressed. If you hear the noise without the clutch pedal being depressed, it is most likely the gearbox first motion shaft bearing that is at fault. First motion shaft bearing noise usually goes away when the clutch pedal is pressed.
It is most likely the Wheel Bearing that is going bad.
It is important to know the signs of a bad car part. If an AC clutch bearing going bad, the biggest indication would be the trouble driving with the AC on in the car.
bad connection or your wheel bearing is going bad
Bad bearing Bad valve
A bearing going bad.
Could be a bad wheel or axle bearing or pinion/carrier bearing going bad. The year, make, model info may help us.
Could also be the harmonic balancer. When they go bad they make a knocking noise when the engine is idling. If it has a rod or main bearing going bad it would NOT affect the way it runs so you could have a serious problem in the motor itself. If the rod or main is going out it will not run long like that. SORRY TO BE THE ONE TO TELL YOU THIS. Ray