hi, driveing to work. when i hit bumps, car seems to go BOOM BOOM! feels like no suspention. also i run down the driveay and hear a squeaking when the car dips down. i can bounce the vehical. i hear a hiss when i push down on the rear but front i don't. do i need shocks and springs all around? would poor shocks make it squeak and flop over the road? i can c that my balljoints and tierods are ok.