I had a different creaking sound entering my driveway and found out my rr sway bar bushing bracket on one side had snapped and the bar was dangling by the endlinks. But it has been lowered for last 9 yrs with a progress 22mm rr sway attached to tokico illuminas with oem endlinks for over 80,000 miles. Seems that the oem endlinks were not the weak point. But after 8 yrs of use and 3 wheel motion entering driveway at angle, not complaining. Will just put the oem rr sway back on until I find a couple of universal 22mm brackets that I can bend to fit. Car didn't feel much different driving it that way either so I may just leave the oem on there if it has more flex for the driveway thang.