jolt wrote:Most rattling noises from brakes are from the pads. When you apply the brakes, the pads are tight on the rotor and are shifted tight in the caliper mount by the wheel rotation. Because the pads are tight, the noise goes away. Most of the time the rattle is caused by pad hardware/clips not being replaced or are in the wrong location on the pad. Some things to check that you did not say in the details, and it is the little details that will bite you so:
Also all the proper brake pad retainers and pad backing plates (insulators) need to be in the proper locations so that you do not get noise from a rattling pad in the caliper mount. Follow pad manufactures info for the insulators as different pad manufactures have their own recommendations. I used Wagner Thermoquiet pads and in the box Wagner said not to use any insulators as they were built into the back of the Wagner Thermoquiet pads. Ensure the disc brake grease covers the area where the insulators contact the back of the pads and the caliper mount. This also helps quiet pad noise which is why you put grease on the back of the pads. DO NOT get any of the grease on the face of the pad or rotor.
ehoff121 wrote:The triangle clips are drag reduction spring clips. Non-Vibe example:
They help push the pads apart and off of the rotor when the brake pedal is released.
However, one of the caliper slide pins in each caliper has a rubber bushing at the end (as jolt said) that makes it act like a piston; when the brake pedal is pressed, the caliper contracts and compresses the air in the slide pin chamber. When the brake pedal is released, the compressed air pushes the caliper apart, so this clip is technically unnecessary (if there wasn't one there originally).
Is it possible that there is too much brake grease in the pad brackets, allowing them to slide around?
ehoff121 wrote:Sorry, I don't know about your rear caliper having two bushings. The Toyotas I've worked on only have one pin with a bushing. Can a 2nd gen owner chime in here please?
Also, what is a 1SA? Is that the same as a GT? Is there a difference in rear caliper?
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