Originally Posted by James1549

Dave, I have seen this before on regular customer's cars after new brake pads have been installed for several months. My boss would have me change them out again with a different brand and the problem was resolved. My only thought is that the lining material must have some give to it when applying pressure. Once you release the brakes, the lining expands back to the regular thickness, requiring more pedal travel to reapply the pads to stop.

James