NO! Stop! Absolutely no lubricants on the brakes! Professionals will even use brake parts cleaner to wash their fingerprint grease from the friction surfaces. Grease of any kind on the rotors or pads can be washed off if it is done before they get hot. Once they get hot from normal braking, the grease will soak into the friction material and CAUSE a squeal. After that you can never get the grease out. The pads will have to be replaced. There are a number of things that can be done to cause a squeal, and a number of things professionals do in an attempt to prevent squeals. Squealing is more of a problem with higher quality pads.
One type of grease you can use is special high-temperature brake grease on the backs of the pads where they contact the pistons and caliper fingers. The pads are going to vibrate. That grease lets them do that without transferring the vibration to the calipers where it will be amplified. Auto parts stores have that grease from different manufacturers. It contains molybdenum disulphide.
PB Blaster is good stuff but not for anyplace in the braking system. The only thing better comes from the Chrysler dealer's parts department and is called "Rust Penetrant". It does in ten minutes what WD-40 can do in a weekend.
Thursday, January 20th, 2011 AT 5:43 AM