If it is wheel bearing, going around the corner will cause a "roaring"
noise... This is the only way to tell by hearing of wheel bearing.
If it is after hitting a pothole or bump, whup sound might be the shock
absorber... try standing on your front bumper and rock the car up and down
to see if you can hear the whup... it does sound like a tire a bouncing...
causing cupping on tires... feel the tires to see if you have high and low
spots... if so, shocks are bad.
I driving to work this am, about 60 mph, and the noise got real loud,
whap-whap-whap, was related to speed, I slowed down and looked under
car, could not see anything.
Started back up, going slow, noise still there, drove 35-40 for about 2
miles, then then noise decreased, then increased again, then disappeared.
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