rear shocks

I'm not sure this is the kind of noise a bad shock would make, I would look at the rear sway bar links(if applicable) and suspension bushings first. You might find a free repair manual here: http://bit.ly/autozone_repair_info or go to http://bit.ly/alldata_repair_manuals or http://bit.ly/mitchell_repair_manuals_online and get an online repair manual subscription.