I've seen all sorts of issues be resolved that were due to aged FPR/Dampers. It might be functioning, but probably not as well as they should. Why wait for failure? Preventive maintenance is just that.
1993 Nissan 300ZX Slicktop (Oxford Gray Metallic) 1992 Nissan Skyline GT-R (Gunmetal Gray) - Long Live the Z and Godzirra! - "Love cars. Love people. Love life." - Mr. K.