I've changed all four of my brakes in both my 98 Chevrolet S10 (2 disc brakes in the front, 2 drums in the back, RWD) and my 2004 Pontiac Montana (2 disc brakes in the front, 2 drums in the back, FWD) and whenever extreme pressure is put on the brakes (such as slamming on brakes, pushing hard on the brakes because there wasn't adequate space to stop, etc.) the brakes squeal. However, if you lightly press on the brakes or add medium pressure (such as coming to a slow stop) there is no sound at all. Both automobiles are two wheel drive, both are V6 engines, and both of their brake pads and shoes have a lot of %26quot;meat%26quot; left. I've added anti-seize compound to both vehicles caliper bolts and other parts of the caliper. I've added no noise to the back of the shims of both pads on both vehicles. I've cleaned both pads and shoes with brake cleaner to remove brake dust. The brake fluid is fine and isn't discolored.
What would cause brakes to squeal ONLY when extreme pressure is applied?
Wow-you covered all the bases.
There must be some kind of disconnect in the system.
What would cause brakes to squeal ONLY when extreme pressure is applied?
glazed rotors from hard braking...have rotors turned...or scuffed or replace...stop braking so hard...give the guy ahead a little room eh!
it is called glazing it happens when your rotor or drum is slick here is what i would do remove the new pads and and use a piece of sand paper *not course* and remove the glazing from the pads along with some brake cleaner clean well and have the rotors machined same with the rear drums take the glazing off the shoes and also machine the drums and clean the shoes don't worry the cleaner will dissipate *dry* off of the shoes .. oh and semi metallic pads and shoes are a best bet hope this helps
you probably have ridges worn into the discs/drumsfrom the old linings. when you push hard on the brakes the shoes and pads move slightly in their mountings. this is nothing to worry about if you can put up with the noise. next time you replace the brakes you could have the rotors %26amp; drums turned, but I would replace with new next time. rotors %26amp; drums wear as well and I cant think of a more important safety item than brakes!.
