Rear seat belt retrator coil spring virbration

My hearing is very sensitive! I pin pointed a consistent virbration in the rear L & R pillars! Using a rubber mallet on the tires you can hear the recoil springs virbration s and for me I hear the back center seat retractor recoil spring vibrating! Going address this with the dealership for updated fixes, or I have to fix this myself. Anyone had this issue? I have taken the rear seat apart and welded reinforment bracket to stabilize the retractor, but the coil spring virbrates.even w the JBL system turn up i can hear the retrator coil spring vibrating distorting the music! Yes I have very good hearing!

 

Yeah I kind of figure that ! When I was a auto tech we did it as a goodwill it didn't resolve it! I am planNing to drill a small hole into the plastic coil housing and inject dielectric silicone grease to isolate the coil but also allowing the coil to operate freely. In theory it should work!

 

Yes its the stupid inertial ball rattling! Nothing you can do about that! Just wrap the area around the seat belt inertial ball with g mat and packet the general area with heavy sponge. Yes it reduce the pitch and noise level a little.