J-RAD

The brakes on my '82 SC have recently started to squeal when they are cold. After driving for a few minutes, with stops, the squeal goes away. If I park for a few minutes and start driving again, however, the squeal returns...of course until I stop a few times. It sounds like it may be coming more from the fronts...although it is a little hard to know for certain. Any ideas? Could it be wear indicators on the pads? I thought the wear indicator noise was more of a grinding sound. I had the pads checked about 2000 miles ago and they were all 75% or better although I did do one DE session since that 2000 miles.