You might want to examin your proportioning valve
If the piston has come out, the caliper will need replaced.
Brass washers replaced when caliper replaced?Fitting tightened completely?
Does it turn freely with the caliper removed? if not, check the bearings or hub assembly. You only replaced one caliper? If one's bad, the other isn't far behind.
The brake caliper boot seal keeps out dust and dirt. If not replaced it can cause the caliper seal to leak and the brakes to possibly fail. It is simple to replace.
if the caliper has been replaced there are two copper gaskets that go between the brake hose and the caliper
YES! If the car has been in use could be the caliper the caliper slider or the brake hose connected to the caliper. yes, if the car has been in use and the rotor is rusty then the caliper is frozen and needs to be taken apart and replaced.
Whoever replaced your pads may have neglected to apply anti squeal goop to the back of the new brake pads. Brake pads should have some greasy stuff smeared on their surfaces where they meet the caliper, the caliper piston, and at the ends where they fit into the caliper. The squeal is caused by high frequency vibration where the back of the pad presses against the caliper and caliper piston(s).
The caliper (especially the rubber seal around the piston), the caliper slider bolts & seals and the pad clips should all be inspected, however if they are all in good condition there is no need to replace them. Inspect the caliper sliders carefully and if they show any sign of sticking or binding they should be cleaned out and re-greased or replaced if they are rusted. If the rubber boots on the caliper sliders are torn they should be replaced immediately.
A brake pad is the friction surface, replaced as it wears, between the caliper and the rotor.
If the caliper is sticking or leaking it is possible to buy a rebuild kit and replace all parts that are worn inside. If the caliper has a cracked or broken housing then the unit can not be repaired and must be replaced.
If a brake caliper is not replaced when it is malfunctioning, it can lead to reduced braking performance, uneven wear on brake pads, and potential brake failure. This can cause longer stopping distances and increased risk of accidents. Additionally, a stuck caliper may cause overheating, leading to damage to the brake rotor and other components, resulting in costly repairs. Ultimately, neglecting a faulty caliper compromises vehicle safety.
If the caliper piston is sticking, replace the caliper. If the caliper yoke is sticking in its guides, clean the guides with a wire brush. Some caliper yokes make use of shims and bushings in the guides to reduce friction, these may need to be installed or replaced. Check with your dodge dealer regarding those shims.