bent exhaust after wheeling....=humming?

well... here it comes, i have noticed that my exhaust is bent right after its connection to the exhaust header..... .
also after last wheeling... one of my aluminum bumpstops (DS-bottom)is loose inside the coil... now driving on the freeway... at speeds 80km/h + i get a humming noise... checked my tranny fluid, its there... checked my tc fluid, up to the filler plug...
my question is...
does that sound like a bent front driveshaft? it hums in neutral too..

its a 98 with auto and 4" Teraflex lift