Join Date: Mar 2003
Location: Los Angeles (born & raised here)
I'm pretty sure you need to push and turn at the same time, and sometimes you have to push pretty hard. The piston retracting tool from the parts store might be a worthwhile investment. I'd spend the minimum on a cheap one unless you plan on doing more work like that in the future. The tool captures a couple slots in the piston and you twist the threaded shaft with a racthet or wrench and it turns the piston while applying pressure.
I honestly have not done a rear Mustang caliper, but have done many other rear pad swaps and sometimes use a similar tool.
Here's another thought... Do you still have the stock rear brakes, or might you have upgraded to Cobra or Mach 1 parts? There are 2 different pads for the rear, one being thicker, for use w/ the GT caliper and thinner rotors.
Brake Late, Accelerate Early, Be Smooth, Drive to Win...
Matt Weiss - Red 1995 Cobra by JWjr.