Hi
If it is the rear rose joint you can feel it better when the wheel is on, just jack the car a little them pull the wheel side to side to see if there is pay in the joint. See other thread steering & suspension for part numbers on stainless steel joints.
Lee
Just to add something else - but it maybe the shock absorber itself is weak or failing
If it is the rear rose joint you can feel it better when the wheel is on, just jack the car a little them pull the wheel side to side to see if there is pay in the joint.