Dave, are you feeling a vibration from the driver’s side rear and think you have a warped rotor? It’s more likely to be axle bearings. It’s pretty easy to diagnose. Just lift that corner off the ground, grab the tire at 12:00 and 6:00 and try to rock it back and forth. While you’re looking around in that area, how are your u-joints, upper ball joints and lower shafts? Considering the amount of work required to replace a rotor (or bearings, axle, etc.), do yourself a favour … it’s time to rebuild your rear uprights / stub axle assemblies. If the driver’s side needs attention, the passenger side is probably not far behind.
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