rattling noise

so i installed a new tracbar the other day and got all the bolts tightened up and test drove it right after and while driving at low speeds i could hear a rattling noise, like a bolt was kinda loose somewhere. so i got back home and checked all the tracbar bolts and everything was still tight. and im pretty sure thats the source of the noise cuz i didnt mess with anything else and it started doing it immeditately after i installed it. got an alignment and everything today and can still hear the rattling while driving at low speeds, no popping when i turn, just when im driving straight. thoughts?