Both brake pads

[Porterave]

Do you have to change both truck brake pads on the same axle at the same time?
What happens if you just change the one that is worn? They are not warn evenly.

[Yauchout]

(06-16-2025 )Porterave Wrote:  Do you have to change both truck brake pads on the same axle at the same time?
What happens if you just change the one that is worn? They are not warn evenly.

it will work just fine and is legal. but you need to figure out what is wrong with your brakes that one side is worn so much farther then the other. rather then just pad slap it because you obviously have a issue.

[Rawze]

(06-16-2025 )Porterave Wrote:  Do you have to change both truck brake pads on the same axle at the same time?
What happens if you just change the one that is worn? They are not warn evenly.

if they are not worn evenly, then you have brake issues.

[SquareOne]

(06-16-2025 )Porterave Wrote:  ...They are not worn evenly.

If its the lower shoe wearing more than the top, check your S-cam bushings. I've seen plenty trucks/trailers with S-cam bushings wore slap out, which will begin to wear the shoes unevenly. Typically it's the bottom half thats dragging. If you have someone in the truck operating the brakes, you should be able to see the bottom make contact before the top. You'll also tend to see a larger gap between the shoe/drum up top than the bottom.

[Porterave]

Thank you for the help.
I think it may be a broken slack adjuster on the brake that is worn.

[SquareOne]

No problem... see my post on the other thread you opened. Those few videos should help you a bit on understanding auto-slack adjusters. If you need more info, YouTube typically has some good content on these types of things. Just search your particular branded component and go from there.