awful sound when hitting bumps - cant determine the problem

i am about to add some gasoline to the car and toss a match at it. i just finished boxing in the tosion bar area and it made ZERO difference. if anything the crunching sound is worse.

put the wheels up and tried to shake them to see if i had any bearing movement. they seem fine to me and the mechanic already replaced one. now the fender has cracked the mounting tab so that doesnt help things but i am hearing a crunching sound not a metal slapping sound. i will look around again but this is extremely frustratiung. bringing it to mechanic again next week. then it may just get a for sale sign.