Re: Brake Sticking???
Sounds like the sticking caliper is not only applying pressure unevenly, but may be hanging up. I'd jack up the car, pump the brakes a few times and spin the two front wheels for comparison with one another. For the side that appears to be tight and the wheel does not spin freely, crack the bleeder on the caliper and see if brake fluid is expelled under pressure. If this is the case then something is not allowing the pressure to be released from the caliper bore in which the piston is located. You said the brakes have less than 5K miles in 15 years, but you replaced the calipers. Was this replacement just done or done 15 years ago? A few things come to mind you can check. The rubber boot/seal around the piston on the sticking side has an issue or there is corrosion of the piston restricting its return motion. Another explanation might apply if the brake hoses are old (even though they still seem flexible). Old hoses can deterioriate internally and begin to shed rubber, but the rubber may not actually fall off inside the hose, but instead, partially disconnect inside the hose and act like a check valve restricting fluid flow in one direction, possibly the return flow direction in your case. Rubber brake hoses are cheap, replace them if they are old. One other thing, what about lubrication on the areas where the ears of the pads rub on the caliper brackets or is it possible the anti-squeek pad on the back of the pad is stuck on the piston or on the other side of the caliper for the outboard pad? Grabbing at straws here, just some random thoughts.
'69 Z/28, Lemans Blue/White Stripes, DZ302, Tremec Magnum, 4.10, Procar Elite Seats,
Custom Upholstery, Dynatech headers, 17" VWW V45's, 235/45, 275/40, C5 Front Brakes