Aoa , I have this grinding sound / thak thak
when brake is applied , I have changed the pads got original. ,even used Mk pads
sandpaper etc used , both drums were tool / polish
Lubrications , adjustment everything has been done still
After few days the sound is back
Mechanic says remove drum brakes and install disc brakes as this sound is common in carolla vitz etc
Anybody can help or refer to a reputable mechanic in Isl/pindi