Tak tak noise while braking at low speed from RR side ( Easily audible inside in silent road condition).

Tak-tak noise while slow braking from rr brake.

rear having shoe brakes.
checked all things. Cylinder, shoe, drum diameter, all parts.

After setting concern goes off. After few kms once again repeat.

Can you help to understand reasons.

All other possible thongs checked and changed also. Still concenr reoccure after few hundred kms.