Quote:
Originally Posted by ASUMTNEER
My wife's 2011 LTD 4X4 with 165k miles has been making a grinding noise, seems like in the front, for some time now. I checked the brakes and found a front caliper piston frozen, so I changed both calipers and the noise persists. The sound doesn't change when I use the brakes, so I don't think it's brake related. It sounds like a metal on metal grinding noise similar to a worn pad grating against a rotor, but the pads are 70% still. Could it be a wheel bearing? I can only hear it at low speeds, but that could be due to the road noise drowning it out at high speeds.
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Take wheels off and rotate by hand each side. Compare. If it is wheel bearing that is really damaged you should feel a difference in smoothness.
If it is wheel bearing ensure diff oil levels are set appropriately.
Check for items rattling in the interior or rear hatch area.
grease u joints and drive shaft slip yoke to see if that makes any difference.