Sometime brake squeak

Brand new rotor and pad ceramic pads. Normal after a month the brake squeak sometimes when I brake? 5 lug truck....

 

It can be normal.
A lot depends on the brand and quality pads you used?

Did you bed the pads in?

 

No how was supposed to do that. It was quiet the first month

 

https://www.powerstop.com/resources/brake-pad-break-in-procedure/

 

When you installed the pads (and shims), did you put a small amount of lubricant on back of the pads (and shims) per the FSM? Squeaks are usually caused by either the vibration that occurs between the pads and shims, shims and caliper piston, or both. Some aftermarket pads come with shims that supposedly don't need lube.

It doesn't need much, just enough so the back of the pad and the shims or shims/caliper pistons don't have metal to metal rubbing (which causes the squeaking).

Another possibility is because the pad is contacting incorrectly. I don't remember is front contact first or rear contact first causes it off hand.

 

How could it be pad connecting incorrectly? Just trying to factor things out

 

Yes I lubricated but prob wring area? Guy at checker told me diff. At the end of the pad where touches those metal brackets

 

What brand pads did you use?

 

RE: contact
I don't remember which way causes it (front part of pad first or rear - this is in relation to rotation direction) - it's something I learned YEARS ago in relation to disc brakes (mind you, I'm 60). If you have a bicycle, you can see/hear it happen more readily with that because of the lighter construction of the rims and calipers. Bend the pads on the calipers so either the front or rear touches first and you'll hear it (again, it squeals one way but not the other). The same action/reaction occurs in the interaction between the car's pads and rotors (with slightly different dynamics due to the mass of the car, the rotors, etc.). I believe it's rarer now days because pad technology, caliper construction, etc., have improved significantly.

RE: lubing
Yes, it's usually recommended to also lube where the ends of the tabs of the pads contact the caliper bracket shims so the pad can more easily slide in the slots and not get bound, although again here, there are some aftermarket ones that are supposedly coated to not need any lubrication. If you google "grease back of brake pads" or something similar, it will come up all over the place.

 

The more I think about it, the more I think it was that squealing happened if the rear or trailing edge of the pad touches the rotor/rim first. But again, I'm not sure...I am 60 'ya know.

 

Brake best ceramic pads

 

This is from the FSM for my 2013. Mind you, it's a 2wd, so that's what I have for the FSM (I'm a cheap@ss so I'm not going to pay for something that covers something I don't have) YMMV.