like the title says i have a ticking sound coming from the driver side rear and it only does it when i brake its a consistant ticking untill i get really slow and the ticking slows too im thinking it coming from my drums but not sure ive tried just using my e-break handle but it doesent do it. any ideas are more than welcome

i know its not a rock cuz there isnt one in the tread and it doesent do it under acceleration breaking only