Try driving at 40 and turn left then right back and fourth if its a wheel bearing it should get louder as you turn your steering wheel back & fourth if not it may be a tire you may want to rotate front to rear
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Odds are it will either be brakes, bearing, or drive shaft.
You'll need to jack it up, make sure it is supported safely, and check the brake pads and rotors. Then check the drive shaft cv joint and the bearing.
Most likely is a problem with the brakes like worn out disk brake pads now making metal to metal dragging between the disk and caliper. take it to a brake shop and have it checked, because it is unsafe to drive if it is this issue.
If it only does it during braking, it's not an axle. Likely culprits are warped rotors or bad suspension bushings.
A warpped rotor will cause the brakes on that rotor to grab and release as the rotor goes around, causing a shake. This is often felt in the brake pedal as a pulsing as well.
Failed front suspesion bushings can cause this as well, esppecially on front wheel drive cars.. When you are accelerating, your wheels are pulling the control arms forward, but when you brake, the control arms are pushed backwards. So, depending on what bushings are worn out, your alignment can change pretty drastically going from accelerating to braking or vice-versa. This would also account for the moving/hitting sensation you described. To check this you need to jack up the front of the vehicle and check the control arm bushings, as well as any other bushings for links/parts connected to the control arm.
If you drive at about 40 on a smooth road,and "weave" left and right. Does the noise get noticeably quieter one way than the other? If it does ,it's a wheel bearing. Easy fix (I'd change both if thats the case)
If the noise doesn't change,it has to be a transmission bushing or final drive noise,not good.
Hope this helps.
if the noise isassociated with "wheel speed" then it is in the rolling parts... axle hub bearing brake rotor caliper wheel or tires...if it goes away on right turns then you are unloading or separating the issue then...so a hub /wheel bearing /axle issue is most likely...does your brake pedal pulse when you feel it..(riding the brake while driving)..does the steering wheel shimmy ?