ask lang po and thank you in advance...

i have 2015 model vios trd automatic transmission 11k mileage. i now can hear small rattling/vibrating noise while decelerating from 10km/h until zero with brake. but casa already check the brake and they are ok naman. nilinis pa nila. the sound disappeared during complete stop or if car run10km/h up. also it only become noticeable upon driving for quiet sometime or if the engine is already warm.... cannot appreciate it while i just started the car and engine is not yet hot.. is there anyone here who have same experience? is it a transmission problem? thank you mga boss...

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