Rear drum squeel, how do you guys make it stop????

[Tom]

The rear drums on my 98 have been squeeling pretty much the entire time I've owned the truck. I've gone threw 3 sets of shoes, two of hardware, wheel cylinders, and a set of new drums and having them turned all trying to get rid of it. I finally relized its the backing plate of the shoe rubbing againts the backing plate of the drum. If I put some grease in between these points I can get rid of the squeel for a day at most. I'm at the point where either my brain breaks and I murder the axle with an axe or something else manly, or I replace them with disks which I can't afford. Anyone else have this problem? Its really annoying, none of my 73-87's ever had this problem!