I went over a giant speed bump, slowly, and the back end still dropped out...my problem is now something rattles back there, and its more noticable on acceleration. I dont think it has anything to do with the gear box b/c i'd notice something while driving right? My question is did i just knock the muffler loose and need it tightened, or could it be something more expensive to fix?

 

could be something broken in the suspension or even something as small as the spare/jack came loose (seen it done).....it really could be anything, a exhaust hanger could be knocked loose.....but like i said it could be ANYTHING

id get it looked at to know for sure whats going on

 

mabe your spare tire is making all the noise

 

Didnt even think to check the spare, but the noise really sounds like its coming from underneath the car...think i'm gonna get it in the shop tomorrow. Thanks guys