i recently put a set of h@r s sport spring on my 2000 gt and also blisten shocks and struts, put the isolators on the bottom rear springs but not the top, and at slow speeds when i hit a bump it feels like the trunk is not shut and makes a rattle i checked my mach 460 box and its nice and tight, what could make that noise? it dont make that sound at speeds over 35 mph?