The caliper didn't seem to stick all the time but when it did it would cause a loud hum very much like when you blow on the neck of a bottle. The hum would go away when the brakes were tapped. I've had the caliper off a few times and it could be easily retracted by prying on the pads. I've even applied some grease on the sliding parts of the caliper frame but with no change. I've almost suspected the wheel bearing to be at fault but that would more likely cause a constant noise which it doesn't do. I injected some grease into the bearing just in case anyway. I replaced the axle shafts as well since they were in bad shape (rubber cracked and leaking grease). I was amazed how easy a job it was.

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DJ


84 300D Turbodiesel 190K with 4 speed manual sold in 03/2012