More then likely this is telling you that the brakes are worn out and are getting to metal to metal. Most pads have wear indicators and that will cause noises at times.
https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd
However, you are correct that the road salt does cause different noises at times but normally it wears off and does not reoccur until there is more salt put down. So if this happens when there was no salt put down then I suspect the brakes just need to be replaced.
Here is a video on an F-150 that is similar to your truck:
https://www.youtube.com/watch?v=Iv9mWLv9QLM
Below is the process from the manual that will help with this as well. Please let us know what you find. Thanks
Images (Click to enlarge)
Apr 3, 2021 at 6:50 PM
