Chevrolet: noise in front end drivers side, hub problem, head gasket

Question
I replaced trans, blown brake line, alternator, battery, head gasket, radiator and now have a noise on drivers side that has gotten louder with time. One suggestion was front wheel drive. 6 mos ago mechanic told me there was a hub problem that would become louder over time and could be fixed for $260.00. This is a 96 cavalier I bought in 98, 69,000 miles for $15,0000. I am well over $20,000 now. My credit union said I was taken. What is the banging noise, that eases up on driving on ramps or curves?

Answer
Hi Su;
      well as far as the noise it could be a lot of things as it is the type of trouble that I would have to be in the car to hear it and feel it , but if you were told it could be a hub problem / and it could also just be a rim or even a tire that has gone bad  with a bubble , i would have the front wheels checked (on)
the car a front end wheel balance - as that should tell you what it is and at a lot less than 260.00 .