Hey guys i have new disc brakes all the way around on my 78 malibu. They work fantastic but make a little noise when driving and then squeal pretty loud when braking. There is no rubbing that i can find. I did not use any lubricant on the pins or the baking plates on the basis that its a fair weather car and grease will just attract dirt, but its driving me crazy and wondering if thats why they are squealing