My wifes 89 244 auto just came in with the rear brakes sounding metal to metal.. Yep that was what it was..The left rear pads are gone.. but wait the right ones are in good shape,, hmmm only about half gone on the right side and metal to metal on the left..Bad caliper on the right or left??? Any ideas? No brake failure warning light so I assume that the pressure is equal,,I replaced teh pads and the pistons went back into the calipers without any excessive pressure so I am thinking they are not frozen. Checked the right side and they seem to be working properly, they go in and out without sticking..I am stumped.
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Max..1989 244 DL 5 Spd., Bilstein HD, Turbo Swaybars, Poly Bushings all round, Turbo Wheels, Black leather interior, Electric mirrors, LED dash and gauge lights.

Could be some air in the other side. If the caliper's not stuck, it's good in my book. Replace all the pads and bleed the system, monitor it for wear.
Replace the rotors too- there's no point in trying to have Volvo rotors turned. They're too thin as it is.
Don't forget your pad shims and brake grease, all to eliminate squeal.
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Rob Bareiss, New London CT ::: '87 244DL/M47- 234K, '82 245T/M46-182K, '89 244DL/AW70- 212K Not too distant past: 86 244DL 215K, 87 244DL 239K, 88 744GLE 233K, 88 244GL 147K, 91 244 183K

Isn't there also proportioning valves inline with the rear brake lines? Could they possibly be involved?