Front Disc brake sound...inner pad shifting from side to side.

Has anyone ever had this issue? I have a loud popping sound, that I believe I've tracked down to the inner brake pad slightly moving from sided to side in the caliper (opposite of it's normal direction in and out). I'm pretty sure this is it as I can pretty much replicate the sound by hand. It's as if the brake pad hole for the pin is slightly larger allowing for this small movement. There appears to be just a bit more space inside the caliper also allowing for this movement. I mostly hear it when shifting from reverse into drive, with my foot on the brake. I'm not too sure how to resolve this. Maybe just buy another set of pads that are drilled more precision? Any feedback is greatly appreciated.

coated the pad base with CRC Disc Brake Quiet silicon. Hopefully this helps. I wish there was a shim that held it in place better.

The caliper bracket may be worn. A little mig weld and the grinder.
Doug

Bend the tabs on the pad a bit more.

did you lube the pad or use the pad glue? we always use the spray glue in the shop. never any comebacks. make sure everything is very clean before application. a tiny bit of dirt can make a big diff.