brake pads "clicking"

[john]

the drivers side front clicks when i 1st press the pedal, it only does it in reverse, it sounds like the pad hitting the disc, it only clicks once - when i 1st depress the pedal.

any ideas?

i do a lot of 3-point turn doing my job and its driving my bonkers

[exect]

For what its worth my guess wold be, that the pads are sliding in the caliper because they are a bad fit.
Exect

[john]

would "shims" make any difference? there is a metal plates or something on the pads but it appears the shims are a seperate item