Replaced front hubs and still have roaring noise

Maybe Tires or wheel bearings.

it sounds like the power stearing pump is bad or the stearing rack is bad

Sounds like a bad wheel hub to me

It is very unlikely that the hub would need replacement in that short a time. What you describe as a roar could be a defective fan clutch. The fan clutches in the early TB's had problems. Does the noise sound like a jet engine? If so, it definitely is the clutch.

Have you checked the condition of your brake pads? If lining is worn off and you're getting metal to metal contact between the pads and rotor, it will make a similar "roaring" sound.

Sounds like a bad wheel bearing especially with the noise.

half shaft broke??

it sounds like a bad hub bearing

try raising the front end off of the ground and spin the tires by hand and feel for roughness in the hubs

THIS NOISE IS USUALLY THE HUB. HAVE SOMEONE GO WITH YOU ON A TEST DRIVE. GET THE ROARING TO HAPPEN AT ITS LOUDEST AND GENTLY SWERVE THE CAR LEFT AND RIGHT. DON'T BE SURPRISED IF YOU THINK BOTH HUBS ARE BAD. LIFT THE FRONT OF THE CAR AND PUT IT ON JACK STANDS. PULL OUTWARD ON THE BOTTOM OF THE TIRE WHILE PUSHING INWARD ON THE TOP OF THE WHEEL. IF THE WHEEL MOVES EXCESSIVELY YOU FOUND THE HUB THAT IS NOISY. USING A MECHANICS STETHOSCOPE YOU CAN SOMETIMES HEAR A ROARING TYPE NOISE ON THE BACKING PLATE SIDE OF THE HUB WITH THE ENGINE RUNNING AND THE TRANS IN GEAR. TRY NOT TO GET THE SPEED UP TOO FAR ESPECIALLY IF YOU CAN HEAR THE NOISE AT LOW SPEED, YOU DON'T WANT TO VIBRATE OFF THE STANDS.

bad hub bearing