rattling in rear suspension...
 

hey guys...
i have a 1990 240sx and last sunday i installed kyb agx shocks and tein springs. it rides pretty nice now, but theres a rattle in the rear every time i hit something or whatever or sometinmes when i turn really fast. my dad was complaining he hears something in the front but i took it out at night and all i hear i front is the frame hitting if i go over speedbumps. so i have to go super slow.
anyhoo... i was wonder if any1 here might know what it is in the rear that keeps rattling. it sounds kind of like a knocking sound or like we left a screwdriver or something back there. i went back and tried to retighten the bolts on the top in the trunk but everything is tight. maybe we didnt put something in right? or maybe we didnt put something in at all?
hope u guys can help me out.