my tundra make loud clunk and noise over 45 mph on 2008 Toyota Tundra

my toyota tundra makes a loud clunk once i come to a stop it feels like something rolls and hits underneath. sometimes delayed but will happen. also recently it started making loud noise over 45 mph, i thought it was coming from the tires being worn but i bought 4 new tires and the noise is still there. please advise. thanks

Asked by for the 2008 Toyota Tundra