I have been reading some threads about rear upper ball joint replacements, but haven't found any particular symptoms I should be looking for. When I drive my car, I can hear the left rear ball joint creaking slightly (like rubber against metal). Once I give it a shot of WD-40, it stops for some time. The linkage seems nice and tight with no play. There also isn't any visible damage on the outside. Am I just worrying too much about the creaks? BTW, the creaking is more common in cold weather than in warm. Has anyone experienced these types of noises from the rear upper ball joints?
Thanks in advance.