I have this drivers side front wheel squeak when backing up in my GP. But It doesn't squeak when going forward. I took the caliper and bracket off, cleaned everything including the pads, lubed the slider pins good, and it still squeaks when backing up.
I jacked the driver side front up again and put the car in neutral, and when I turn the tire backwards, i get the squeaking noise. If i take the tire off and turn the wheel hub backwards, no squeak. It's only when the tire is on the car, and you move in reverse.
Any ideas?
**Update - If I turn the wheel all the way to the right, I can tell the squeak is coming from the axle where it meets the engine.