spring isolator
It's likely a combination of 3 things for you. Worn out shocks, bump stops worn out or completely gone, and sagging worn out springs.
I put the rear Koni to 1/2 trun from full soft with Strano 's springs and new bump stops. Night and day better over the bumps.
Spring isolators usually don't go out on these cars, if at all. I'd check bumpstops first to see if they're still intact.


