Hello, I have a 2003 GT Coupe. I noticed not long after I put Eibach sway bars and Bilstien shocks all around(including quad shocks) the suspension in the rear started skweaking like the car was 60 years old. It seems to only make the noise on roads that are bumpy. Not pot holes but bumpy enough to make the rear go up and down considerably. I also noticed a sharp bang from the rear on hard bumps in the road. I’m thinking the rear control arms bushings are failing due to the new shocks and sway bars putting more pressure on them. Any suggestions?