I recently had 4 new tires put on my car. Immediately after I heard this clicking sound from rear of car, brought it back 2 times but they did not find anything related to tires. The noise is getter louder and it seems to be from rear of car possibly exhaust related. Incidentally the parking brake will not lock, I cannot pull it into parking position. The rattling ticking seems to go away after driving for an half hour or longer, but comes back when driven again. I’m not sure but I believe the heat shield on left rear by gas tank came loose and haven’t been able to secure it. The new noise is not the same as the noise previously from heat shield it is since new tires were installed. I had new brakes installed in June and other than one pad clip needing to be put back clipped in no other brake problems. I am at a loss and would really appreciate any help please!