I think i can help; where are you from?
There are a few different things which could cause wheel shaking and thumps when hitting a big bump. The most likely cause however, is that the struts need to be replaced.
A busted motor mount, for one.
1. She had a thumping headache.2. The giant was thumping on the ground.3. The thumping beat of his heart.
No but, a bad shock or strut along with a wheel out of balance could.
Front rotors are warped and need to be replaced. Could be an out of round disc brake rotor
Bad tire? Rotate and see if thumping changes
Is it accompanied by a shuddering or vibration? You could likely have bad brake rotors.
back struts are bad or exhaust is loose
the speed sensor, trans. sensor , or the speedometer cable
Loose rear lug-nuts, bad wheel bearings, worn suspension bushings/struts, bent control arm, loose/damaged brakes.
Could be universal joint is finished. A bad flex disk
Do you hear the thumping a certain amount of time after filling the fuel tank? I have noticed that some time after filling up i also hear a thumping sound, it could just be fuel sloshing around in the tank. Have you had the struts replaced this is 03 everyone seems to forget these things need to be replaced too.