Sound on the right/passenger side when wheels turn

[Donald]

Drive like this.

 

[PandaBear]

So it turns out all my inside pads were worn out while the outside ones were half worn and appeared to be okay.
The Rear Right disk was touching on the dust shield. Rear disks were also warped.

Yesterday, my Front Right wheel started making a loud gring noise. Turns out the inside pad's backing (metal) plate was so worn that it broke in half.

So I had the pads and disks replaced today.

Can you guys understand why the inside pads would be completely worn while the outside ones remained half worn, on all 4 wheels?

Most likely they were too durable compare to the grease and sliding pin / bracket guide thingy life. Those old hardware got corroded or the grease turn sticky and therefore the inner pads wore out much faster. I think I had that happen at one point on my pads (I think those were Wagner Thermal Quiet) on both the inner front pads only and the outer were only worn half way.

 

[Donald]

Most likely they were too durable compare to the grease and sliding pin / bracket guide thingy life. Those old hardware got corroded or the grease turn sticky and therefore the inner pads wore out much faster. I think I had that happen at one point on my pads (I think those were Wagner Thermal Quiet) on both the inner front pads only and the outer were only worn half way.

I think it's good to ask to report pad thickness at each tire rotation or when your do your own tire rotation.

And log the info however you keep track of vehicle maintenance.

Potentially catch it when you can just get in there and clean and lube the sliding pins.

Or at least catch it before it's metal on metal.

Or in the case of my F250, catch it before the pad wears down to nothing and the pad drops out and you are left with caliper piston pressing on the rotor.

 

[researcher]

So it turns out all my inside pads were worn out while the outside ones were half worn and appeared to be okay.
The Rear Right disk was touching on the dust shield. Rear disks were also warped.

Yesterday, my Front Right wheel started making a loud gring noise. Turns out the inside pad's backing (metal) plate was so worn that it broke in half.

So I had the pads and disks replaced today.

Can you guys understand why the inside pads would be completely worn while the outside ones remained half worn, on all 4 wheels?

as was said, the calipers were sticking because the sliding pins were not well greased/dry. The outside pads are pulled inward when the caliper pushes the piston outward (piston is on the inside of the rotor). If the sliding pins are dry and the caliper cannot smoothly expand and contract the pads, the inside would most likely wear faster. Since the piston is stuck in place. If greasing the pins does not fix it, the piston can stick in the bore of the caliper. You should also clean the bellows around the caliper piston, then apply rubber compatible grease to that area, it's a good practice and helps the piston from sticking But sometimes if that bellow rips, water corrodes the bore and the piston sticks. At that point you're looking at replacing the caliper.